221021120122212 has 48 divisors (see below), whose sum is σ = 542860493369600. Its totient is φ = 69795937245600.

The previous prime is 221021120122157. The next prime is 221021120122249. The reversal of 221021120122212 is 212221021120122.

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, 88336239 + ... + 90803817.

Almost surely, 2^{221021120122212} is an apocalyptic number.

It is an amenable number.

221021120122212 is an abundant number, since it is smaller than the sum of its proper divisors (321839373247388).

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

221021120122212 is a wasteful number, since it uses less digits than its factorization.

221021120122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860456 (or 2860454 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221021120122212 its reverse (212221021120122), we get a palindrome (433242141242334).

It can be divided in two parts, 221021120122 and 212, that multiplied together give a palindrome (46856477465864).

The spelling of 221021120122212 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, two hundred twelve".