21221222011120 has 40 divisors (see below), whose sum is σ = 49346393976864. Its totient is φ = 8487275419392.

The previous prime is 21221222011021. The next prime is 21221222011303. The reversal of 21221222011120 is 2111022212212.

It is a tau number, because it is divible by the number of its divisors (40).

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, 18395884 + ... + 19515403.

Almost surely, 2^{21221222011120} is an apocalyptic number.

21221222011120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221222011120 is an abundant number, since it is smaller than the sum of its proper divisors (28125171965744).

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

21221222011120 is a wasteful number, since it uses less digits than its factorization.

21221222011120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37918297 (or 37918291 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21221222011120 its reverse (2111022212212), we get a palindrome (23332244223332).

The spelling of 21221222011120 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty".