21120212303031 has 8 divisors (see below), whose sum is σ = 28160439971584. Its totient is φ = 14080063084920.

The previous prime is 21120212303023. The next prime is 21120212303039. The reversal of 21120212303031 is 13030321202112.

It is an interprime number because it is at equal distance from previous prime (21120212303023) and next prime (21120212303039).

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

It is not a de Polignac number, because 21120212303031 - 2³ = 21120212303023 is a prime.

It is a super-2 number, since 2×21120212303031² (a number of 27 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 = 21120212302989 and 21120212303007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120212303039) 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, 18981535 + ... + 20063376.

It is an arithmetic number, because the mean of its divisors is an integer number (3520054996448).

Almost surely, 2^{21120212303031} is an apocalyptic number.

21120212303031 is a deficient number, since it is larger than the sum of its proper divisors (7040227668553).

21120212303031 is a wasteful number, since it uses less digits than its factorization.

21120212303031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39225221.

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

Adding to 21120212303031 its reverse (13030321202112), we get a palindrome (34150533505143).

The spelling of 21120212303031 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, three hundred three thousand, thirty-one".