121313113400 has 48 divisors (see below), whose sum is σ = 286025599440. Its totient is φ = 47841785600.

The previous prime is 121313113379. The next prime is 121313113447. The reversal of 121313113400 is 4311313121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4257389 + ... + 4285788.

It is an arithmetic number, because the mean of its divisors is an integer number (5958866655).

Almost surely, 2^121313113400 is an apocalyptic number.

121313113400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121313113400 is an abundant number, since it is smaller than the sum of its proper divisors (164712486040).

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

121313113400 is a wasteful number, since it uses less digits than its factorization.

121313113400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543264 (or 8543255 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121313113400 its reverse (4311313121), we get a palindrome (125624426521).

The spelling of 121313113400 in words is "one hundred twenty-one billion, three hundred thirteen million, one hundred thirteen thousand, four hundred".