2151207171020 has 12 divisors (see below), whose sum is σ = 4517535059184. Its totient is φ = 860482868400.

The previous prime is 2151207171017. The next prime is 2151207171073. The reversal of 2151207171020 is 201717021512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53780179256 + ... + 53780179295.

It is an arithmetic number, because the mean of its divisors is an integer number (376461254932).

Almost surely, 2^{2151207171020} is an apocalyptic number.

2151207171020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151207171020 is an abundant number, since it is smaller than the sum of its proper divisors (2366327888164).

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

2151207171020 is a wasteful number, since it uses less digits than its factorization.

2151207171020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107560358560 (or 107560358558 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 29.

The spelling of 2151207171020 in words is "two trillion, one hundred fifty-one billion, two hundred seven million, one hundred seventy-one thousand, twenty".