121313536405660 has 48 divisors (see below), whose sum is σ = 262268238183840. Its totient is φ = 47101234371840.

The previous prime is 121313536405657. The next prime is 121313536405669. The reversal of 121313536405660 is 66504635313121.

It is a happy number.

It is a super-3 number, since 3×121313536405660³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121313536405660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313536405669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195319071 + ... + 195939190.

It is an arithmetic number, because the mean of its divisors is an integer number (5463921628830).

Almost surely, 2^{121313536405660} is an apocalyptic number.

121313536405660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121313536405660 is an abundant number, since it is smaller than the sum of its proper divisors (140954701778180).

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

121313536405660 is a wasteful number, since it uses less digits than its factorization.

121313536405660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391258726 (or 391258724 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 121313536405660 in words is "one hundred twenty-one trillion, three hundred thirteen billion, five hundred thirty-six million, four hundred five thousand, six hundred sixty".