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212001103031 = 839912577427
BaseRepresentation
bin1100010101110001000…
…0000001110010110111
3202021012201110212220212
43011130100001302313
511433134240244111
6241220355220035
721213404433404
oct3053420016267
9667181425825
10212001103031
1181a00106573
12351068a761b
1316cb777ba83
14a391d092ab
1557abd6198b
hex315c401cb7

212001103031 has 8 divisors (see below), whose sum is σ = 214771920384. Its totient is φ = 209235442680.

The previous prime is 212001103021. The next prime is 212001103033. The reversal of 212001103031 is 130301100212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212001103031 - 210 = 212001102007 is a prime.

It is a super-2 number, since 2×2120011030312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001102997 and 212001103015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001103033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206461 + ... + 1370966.

It is an arithmetic number, because the mean of its divisors is an integer number (26846490048).

Almost surely, 2212001103031 is an apocalyptic number.

212001103031 is a deficient number, since it is larger than the sum of its proper divisors (2770817353).

212001103031 is an equidigital number, since it uses as much as digits as its factorization.

212001103031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578501.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 212001103031 its reverse (130301100212), we get a palindrome (342302203243).

The spelling of 212001103031 in words is "two hundred twelve billion, one million, one hundred three thousand, thirty-one".

Divisors: 1 83 991 82253 2577427 213926441 2554230157 212001103031