121313536405659 has 48 divisors (see below), whose sum is σ = 189685666104480. Its totient is φ = 74268788267520.

The previous prime is 121313536405657. The next prime is 121313536405669. The reversal of 121313536405659 is 956504635313121.

121313536405659 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 1 + 3 + 5 + 36 + 40 + 565 + 9 = 666.

It is not a de Polignac number, because 121313536405659 - 2¹ = 121313536405657 is a prime.

It is a super-3 number, since 3×121313536405659³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121313536405657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56541607 + ... + 58647935.

It is an arithmetic number, because the mean of its divisors is an integer number (3951784710510).

Almost surely, 2^{121313536405659} is an apocalyptic number.

121313536405659 is a deficient number, since it is larger than the sum of its proper divisors (68372129698821).

121313536405659 is a wasteful number, since it uses less digits than its factorization.

121313536405659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108892 (or 2108889 counting only the distinct ones).

The product of its (nonzero) digits is 8748000, while the sum is 54.

The spelling of 121313536405659 in words is "one hundred twenty-one trillion, three hundred thirteen billion, five hundred thirty-six million, four hundred five thousand, six hundred fifty-nine".