121650555507 has 16 divisors (see below), whose sum is σ = 174728268960. Its totient is φ = 74840216832.

The previous prime is 121650555503. The next prime is 121650555581. The reversal of 121650555507 is 705555056121.

It is not a de Polignac number, because 121650555507 - 2² = 121650555503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121650555503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314298 + ... + 584879.

It is an arithmetic number, because the mean of its divisors is an integer number (10920516810).

Almost surely, 2^121650555507 is an apocalyptic number.

121650555507 is a deficient number, since it is larger than the sum of its proper divisors (53077713453).

121650555507 is a wasteful number, since it uses less digits than its factorization.

121650555507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902662.

The product of its (nonzero) digits is 262500, while the sum is 42.

The spelling of 121650555507 in words is "one hundred twenty-one billion, six hundred fifty million, five hundred fifty-five thousand, five hundred seven".