102312021211021 has 8 divisors (see below), whose sum is σ = 104748313216824. Its totient is φ = 99900214552320.

The previous prime is 102312021211009. The next prime is 102312021211091. The reversal of 102312021211021 is 120112120213201.

It can be written as a sum of positive squares in 4 ways, for example, as 370972355625 + 101941048855396 = 609075^2 + 10096586^2 .

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 102312021211021 - 2¹⁵ = 102312021178253 is a prime.

It is a super-2 number, since 2×102312021211021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102312021211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312021211091) 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, 6121328320 + ... + 6121345033.

It is an arithmetic number, because the mean of its divisors is an integer number (13093539152103).

Almost surely, 2^{102312021211021} is an apocalyptic number.

It is an amenable number.

102312021211021 is a deficient number, since it is larger than the sum of its proper divisors (2436292005803).

102312021211021 is a wasteful number, since it uses less digits than its factorization.

102312021211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12242673551.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 102312021211021 its reverse (120112120213201), we get a palindrome (222424141424222).

The spelling of 102312021211021 in words is "one hundred two trillion, three hundred twelve billion, twenty-one million, two hundred eleven thousand, twenty-one".