20101112212220 has 72 divisors (see below), whose sum is σ = 45865221929856. Its totient is φ = 7396617875712.

The previous prime is 20101112212219. The next prime is 20101112212231. The reversal of 20101112212220 is 2221221110102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9158252 + ... + 11138931.

It is an arithmetic number, because the mean of its divisors is an integer number (637016971248).

Almost surely, 2^{20101112212220} is an apocalyptic number.

20101112212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101112212220 is an abundant number, since it is smaller than the sum of its proper divisors (25764109717636).

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

20101112212220 is a wasteful number, since it uses less digits than its factorization.

20101112212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20297511 (or 20297496 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20101112212220 its reverse (2221221110102), we get a palindrome (22322333322322).

The spelling of 20101112212220 in words is "twenty trillion, one hundred one billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty".