121573686870 has 48 divisors (see below), whose sum is σ = 319221229392. Its totient is φ = 32098660800.

The previous prime is 121573686869. The next prime is 121573686901. The reversal of 121573686870 is 78686375121.

It is a happy number.

121573686870 is a `hidden beast` number, since 1 + 2 + 1 + 573 + 6 + 8 + 68 + 7 + 0 = 666.

It is a super-2 number, since 2×121573686870² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 6678132 + ... + 6696311.

It is an arithmetic number, because the mean of its divisors is an integer number (6650442279).

Almost surely, 2^121573686870 is an apocalyptic number.

121573686870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121573686870 is an abundant number, since it is smaller than the sum of its proper divisors (197647542522).

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

121573686870 is a wasteful number, since it uses less digits than its factorization.

121573686870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13374557 (or 13374554 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 121573686870 in words is "one hundred twenty-one billion, five hundred seventy-three million, six hundred eighty-six thousand, eight hundred seventy".