21112011212110 has 32 divisors (see below), whose sum is σ = 46771224841152. Its totient is φ = 6681603548160.

The previous prime is 21112011212021. The next prime is 21112011212113. The reversal of 21112011212110 is 1121211021112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112011212113) 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, 11600005251 + ... + 11600007070.

It is an arithmetic number, because the mean of its divisors is an integer number (1461600776286).

Almost surely, 2^{21112011212110} is an apocalyptic number.

21112011212110 is an abundant number, since it is smaller than the sum of its proper divisors (25659213629042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112011212110 is a wasteful number, since it uses less digits than its factorization.

21112011212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23200012348.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21112011212110 its reverse (1121211021112), we get a palindrome (22233222233222).

The spelling of 21112011212110 in words is "twenty-one trillion, one hundred twelve billion, eleven million, two hundred twelve thousand, one hundred ten".