221012212222220 has 48 divisors (see below), whose sum is σ = 471083929881600. Its totient is φ = 87079671290304.

The previous prime is 221012212222213. The next prime is 221012212222231. The reversal of 221012212222220 is 22222212210122.

It is a super-2 number, since 2×221012212222220² (a number of 29 digits) contains 22 as substring.

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, 14940827 + ... + 25792493.

It is an arithmetic number, because the mean of its divisors is an integer number (9814248539200).

Almost surely, 2^{221012212222220} is an apocalyptic number.

221012212222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012212222220 is an abundant number, since it is smaller than the sum of its proper divisors (250071717659380).

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

221012212222220 is a wasteful number, since it uses less digits than its factorization.

221012212222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866942 (or 10866940 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221012212222220 its reverse (22222212210122), we get a palindrome (243234424432342).

The spelling of 221012212222220 in words is "two hundred twenty-one trillion, twelve billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty".