21202221220120 has 32 divisors (see below), whose sum is σ = 47705901310800. Its totient is φ = 8480727854208.

The previous prime is 21202221220109. The next prime is 21202221220309. The reversal of 21202221220120 is 2102212220212.

21202221220120 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 2870190 + ... + 7116349.

Almost surely, 2^{21202221220120} is an apocalyptic number.

21202221220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202221220120 is an abundant number, since it is smaller than the sum of its proper divisors (26503680090680).

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

21202221220120 is a wasteful number, since it uses less digits than its factorization.

21202221220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039627 (or 10039623 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202221220120 its reverse (2102212220212), we get a palindrome (23304433440332).

The spelling of 21202221220120 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty".