21112222221112 has 32 divisors (see below), whose sum is σ = 43188454278000. Its totient is φ = 9595495008000.

The previous prime is 21112222221091. The next prime is 21112222221143.

21112222221112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21112222221112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11244237 + ... + 12986812.

Almost surely, 2^{21112222221112} is an apocalyptic number.

21112222221112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21112222221112 is an abundant number, since it is smaller than the sum of its proper divisors (22076232056888).

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

21112222221112 is a wasteful number, since it uses less digits than its factorization.

21112222221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24240967 (or 24240963 counting only the distinct ones).

The product of its digits is 256, while the sum is 22.

Multiplying 21112222221112 by its sum of digits (22), we get a palindrome (464468888864464).

It can be divided in two parts, 2111222 and 2221112, that added together give a palindrome (4332334).

The spelling of 21112222221112 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".