21225510450120 has 96 divisors (see below), whose sum is σ = 66565447905600. Its totient is φ = 5414043229056.

The previous prime is 21225510450119. The next prime is 21225510450161. The reversal of 21225510450120 is 2105401552212.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 167119180 + ... + 167246139.

It is an arithmetic number, because the mean of its divisors is an integer number (693390082350).

Almost surely, 2^{21225510450120} is an apocalyptic number.

21225510450120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21225510450120 is an abundant number, since it is smaller than the sum of its proper divisors (45339937455480).

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

21225510450120 is a wasteful number, since it uses less digits than its factorization.

21225510450120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334365379 (or 334365352 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 21225510450120 in words is "twenty-one trillion, two hundred twenty-five billion, five hundred ten million, four hundred fifty thousand, one hundred twenty".