121885602585 has 32 divisors (see below), whose sum is σ = 205340434560. Its totient is φ = 61566478848.

The previous prime is 121885602583. The next prime is 121885602599. The reversal of 121885602585 is 585206588121.

It is a happy number.

It is not a de Polignac number, because 121885602585 - 2¹ = 121885602583 is a prime.

It is a super-2 number, since 2×121885602585² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121885602581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 953629 + ... + 1073861.

It is an arithmetic number, because the mean of its divisors is an integer number (6416888580).

Almost surely, 2^121885602585 is an apocalyptic number.

121885602585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121885602585 is a deficient number, since it is larger than the sum of its proper divisors (83454831975).

121885602585 is a wasteful number, since it uses less digits than its factorization.

121885602585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123817.

The product of its (nonzero) digits is 1536000, while the sum is 51.

The spelling of 121885602585 in words is "one hundred twenty-one billion, eight hundred eighty-five million, six hundred two thousand, five hundred eighty-five".