102312321321 has 32 divisors (see below), whose sum is σ = 158883959808. Its totient is φ = 57347409600.

The previous prime is 102312321277. The next prime is 102312321341. The reversal of 102312321321 is 123123213201.

It is not a de Polignac number, because 102312321321 - 2³³ = 93722386729 is a prime.

It is a super-2 number, since 2×102312321321² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (102312321341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6281430 + ... + 6297696.

It is an arithmetic number, because the mean of its divisors is an integer number (4965123744).

Almost surely, 2^102312321321 is an apocalyptic number.

It is an amenable number.

102312321321 is a deficient number, since it is larger than the sum of its proper divisors (56571638487).

102312321321 is a wasteful number, since it uses less digits than its factorization.

102312321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21981.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 102312321321 its reverse (123123213201), we get a palindrome (225435534522).

The spelling of 102312321321 in words is "one hundred two billion, three hundred twelve million, three hundred twenty-one thousand, three hundred twenty-one".