21021112112331 has 16 divisors (see below), whose sum is σ = 28038068904960. Its totient is φ = 14009115494400.

The previous prime is 21021112112323. The next prime is 21021112112339. The reversal of 21021112112331 is 13321121112012.

It is an interprime number because it is at equal distance from previous prime (21021112112323) and next prime (21021112112339).

It is not a de Polignac number, because 21021112112331 - 2³ = 21021112112323 is a prime.

It is a super-2 number, since 2×21021112112331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021112112298 and 21021112112307.

It is not an unprimeable number, because it can be changed into a prime (21021112112339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236277906 + ... + 236366856.

It is an arithmetic number, because the mean of its divisors is an integer number (1752379306560).

Almost surely, 2^{21021112112331} is an apocalyptic number.

21021112112331 is a deficient number, since it is larger than the sum of its proper divisors (7016956792629).

21021112112331 is a wasteful number, since it uses less digits than its factorization.

21021112112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115946.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 21021112112331 its reverse (13321121112012), we get a palindrome (34342233224343).

The spelling of 21021112112331 in words is "twenty-one trillion, twenty-one billion, one hundred twelve million, one hundred twelve thousand, three hundred thirty-one".