102212110031021 has 4 divisors (see below), whose sum is σ = 102216203288544. Its totient is φ = 102208016773500.

The previous prime is 102212110030889. The next prime is 102212110031023. The reversal of 102212110031021 is 120130011212201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102212110031021 - 2²² = 102212105836717 is a prime.

It is a super-4 number, since 4×102212110031021⁴ (a number of 57 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102212110031023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046591305 + ... + 2046641246.

It is an arithmetic number, because the mean of its divisors is an integer number (25554050822136).

Almost surely, 2^{102212110031021} is an apocalyptic number.

It is an amenable number.

102212110031021 is a deficient number, since it is larger than the sum of its proper divisors (4093257523).

102212110031021 is an equidigital number, since it uses as much as digits as its factorization.

102212110031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093257522.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 102212110031021 its reverse (120130011212201), we get a palindrome (222342121243222).

The spelling of 102212110031021 in words is "one hundred two trillion, two hundred twelve billion, one hundred ten million, thirty-one thousand, twenty-one".