21112011021112 has 64 divisors (see below), whose sum is σ = 43592968281600. Its totient is φ = 9505434570240.

The previous prime is 21112011021089. The next prime is 21112011021173.

21112011021112 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73518064 + ... + 73804672.

It is an arithmetic number, because the mean of its divisors is an integer number (681140129400).

Almost surely, 2^{21112011021112} is an apocalyptic number.

21112011021112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112011021112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21796484140800).

21112011021112 is an abundant number, since it is smaller than the sum of its proper divisors (22480957260488).

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

21112011021112 is a wasteful number, since it uses less digits than its factorization.

21112011021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294556 (or 294552 counting only the distinct ones).

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

It can be divided in two parts, 2111201 and 1021112, that added together give a palindrome (3132313).

The spelling of 21112011021112 in words is "twenty-one trillion, one hundred twelve billion, eleven million, twenty-one thousand, one hundred twelve".