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102211023031 = 137993983659
BaseRepresentation
bin101111100110001000…
…0000111000010110111
3100202211021001221122121
41133030100013002313
53133312010214111
6114542144540411
710245612234535
oct1371420070267
9322737057577
10102211023031
113a390504467
1217986321707
13983b9004b0
144d3896b155
1529d33d2871
hex17cc4070b7

102211023031 has 8 divisors (see below), whose sum is σ = 110087292560. Its totient is φ = 94336736832.

The previous prime is 102211023017. The next prime is 102211023041. The reversal of 102211023031 is 130320112201.

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

It is not a de Polignac number, because 102211023031 - 221 = 102208925879 is a prime.

It is a super-2 number, since 2×1022110230312 (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 = 102211022996 and 102211023014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102211023041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387921 + ... + 595738.

It is an arithmetic number, because the mean of its divisors is an integer number (13760911570).

Almost surely, 2102211023031 is an apocalyptic number.

102211023031 is a deficient number, since it is larger than the sum of its proper divisors (7876269529).

102211023031 is an equidigital number, since it uses as much as digits as its factorization.

102211023031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991665.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 102211023031 its reverse (130320112201), we get a palindrome (232531135232).

The spelling of 102211023031 in words is "one hundred two billion, two hundred eleven million, twenty-three thousand, thirty-one".

Divisors: 1 13 7993 103909 983659 12787567 7862386387 102211023031