21127162146220 has 24 divisors (see below), whose sum is σ = 47779889777424. Its totient is φ = 7800798330816.

The previous prime is 21127162146187. The next prime is 21127162146323. The reversal of 21127162146220 is 2264126172112.

It is a self number, because there is not a number n which added to its sum of digits gives 21127162146220.

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, 40629157714 + ... + 40629158233.

It is an arithmetic number, because the mean of its divisors is an integer number (1990828740726).

Almost surely, 2^{21127162146220} is an apocalyptic number.

21127162146220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21127162146220 is an abundant number, since it is smaller than the sum of its proper divisors (26652727631204).

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

21127162146220 is a wasteful number, since it uses less digits than its factorization.

21127162146220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81258315969 (or 81258315967 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 21127162146220 in words is "twenty-one trillion, one hundred twenty-seven billion, one hundred sixty-two million, one hundred forty-six thousand, two hundred twenty".