121556324130360 has 128 divisors (see below), whose sum is σ = 416770273658880. Its totient is φ = 27783920406528.

The previous prime is 121556324130359. The next prime is 121556324130379. The reversal of 121556324130360 is 63031423655121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62506849 + ... + 64422191.

It is an arithmetic number, because the mean of its divisors is an integer number (3256017762960).

Almost surely, 2^{121556324130360} is an apocalyptic number.

121556324130360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121556324130360 is an abundant number, since it is smaller than the sum of its proper divisors (295213949528520).

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

121556324130360 is a wasteful number, since it uses less digits than its factorization.

121556324130360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990917 (or 1990913 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 121556324130360 its reverse (63031423655121), we get a palindrome (184587747785481).

The spelling of 121556324130360 in words is "one hundred twenty-one trillion, five hundred fifty-six billion, three hundred twenty-four million, one hundred thirty thousand, three hundred sixty".