121635565041660 has 24 divisors (see below), whose sum is σ = 340579582116816. Its totient is φ = 32436150677760.

The previous prime is 121635565041647. The next prime is 121635565041737. The reversal of 121635565041660 is 66140565536121.

It is a congruent number.

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, 1013629708621 + ... + 1013629708740.

It is an arithmetic number, because the mean of its divisors is an integer number (14190815921534).

Almost surely, 2^{121635565041660} is an apocalyptic number.

121635565041660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121635565041660 is an abundant number, since it is smaller than the sum of its proper divisors (218944017075156).

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

121635565041660 is a wasteful number, since it uses less digits than its factorization.

121635565041660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027259417373 (or 2027259417371 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 121635565041660 in words is "one hundred twenty-one trillion, six hundred thirty-five billion, five hundred sixty-five million, forty-one thousand, six hundred sixty".