21220220111112 has 96 divisors (see below), whose sum is σ = 62700413256000. Its totient is φ = 6429927845760.

The previous prime is 21220220111107. The next prime is 21220220111113. The reversal of 21220220111112 is 21111102202212.

21220220111112 is a `hidden beast` number, since 2 + 1 + 220 + 220 + 111 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21220220111113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10704589 + ... + 12531107.

It is an arithmetic number, because the mean of its divisors is an integer number (653129304750).

Almost surely, 2^{21220220111112} is an apocalyptic number.

21220220111112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220220111112 is an abundant number, since it is smaller than the sum of its proper divisors (41480193144888).

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

21220220111112 is a wasteful number, since it uses less digits than its factorization.

21220220111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841211 (or 1841204 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21220220111112 its reverse (21111102202212), we get a palindrome (42331322313324).

Subtracting from 21220220111112 its reverse (21111102202212), we obtain a square (109117908900 = 330330²).

The spelling of 21220220111112 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, one hundred eleven thousand, one hundred twelve".