121655776160 has 48 divisors (see below), whose sum is σ = 288999750312. Its totient is φ = 48393446400.

The previous prime is 121655776147. The next prime is 121655776181. The reversal of 121655776160 is 61677556121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 55069070224 + 66586705936 = 234668^2 + 258044^2 .

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, 2071451 + ... + 2129370.

Almost surely, 2^121655776160 is an apocalyptic number.

121655776160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121655776160 is an abundant number, since it is smaller than the sum of its proper divisors (167343974152).

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

121655776160 is a wasteful number, since it uses less digits than its factorization.

121655776160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201017 (or 4201009 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 121655776160 in words is "one hundred twenty-one billion, six hundred fifty-five million, seven hundred seventy-six thousand, one hundred sixty".