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212012032321 = 1731225503077
BaseRepresentation
bin1100010101110011100…
…1101110000101000001
3202021020111001011002101
43011130321232011001
511433200040013241
6241221425350401
721213566353255
oct3053471560501
9667214034071
10212012032321
1181a062a0941
123510a498401
1316cb9b075cb
14a393552265
1557accbee31
hex315ce6e141

212012032321 has 4 divisors (see below), whose sum is σ = 213237535572. Its totient is φ = 210786529072.

The previous prime is 212012032319. The next prime is 212012032367. The reversal of 212012032321 is 123230210212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170614433025 + 41397599296 = 413055^2 + 203464^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012032321 - 21 = 212012032319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212012032621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612751366 + ... + 612751711.

It is an arithmetic number, because the mean of its divisors is an integer number (53309383893).

Almost surely, 2212012032321 is an apocalyptic number.

It is an amenable number.

212012032321 is a deficient number, since it is larger than the sum of its proper divisors (1225503251).

212012032321 is a wasteful number, since it uses less digits than its factorization.

212012032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225503250.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212012032321 its reverse (123230210212), we get a palindrome (335242242533).

The spelling of 212012032321 in words is "two hundred twelve billion, twelve million, thirty-two thousand, three hundred twenty-one".

Divisors: 1 173 1225503077 212012032321