121513213252000 has 96 divisors (see below), whose sum is σ = 304910262558720. Its totient is φ = 47571130220800.

The previous prime is 121513213251841. The next prime is 121513213252001. The reversal of 121513213252000 is 252312315121.

It is a self number, because there is not a number n which added to its sum of digits gives 121513213252000.

It is not an unprimeable number, because it can be changed into a prime (121513213252001) 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, 322985440 + ... + 323361439.

It is an arithmetic number, because the mean of its divisors is an integer number (3176148568320).

Almost surely, 2^{121513213252000} is an apocalyptic number.

121513213252000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121513213252000 is an abundant number, since it is smaller than the sum of its proper divisors (183397049306720).

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

121513213252000 is an equidigital number, since it uses as much as digits as its factorization.

121513213252000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646346951 (or 646346933 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 121513213252000 its reverse (252312315121), we get a palindrome (121765525567121).

The spelling of 121513213252000 in words is "one hundred twenty-one trillion, five hundred thirteen billion, two hundred thirteen million, two hundred fifty-two thousand".