121361100 has 72 divisors (see below), whose sum is σ = 401307648. Its totient is φ = 27739200.

The previous prime is 121361099. The next prime is 121361129. The reversal of 121361100 is 1163121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121361100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26796 + ... + 30995.

Almost surely, 2^121361100 is an apocalyptic number.

121361100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121361100 is an abundant number, since it is smaller than the sum of its proper divisors (279946548).

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

121361100 is a wasteful number, since it uses less digits than its factorization.

121361100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57815 (or 57808 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 121361100 is about 11016.4014088086. The cubic root of 121361100 is about 495.1002755733.

The spelling of 121361100 in words is "one hundred twenty-one million, three hundred sixty-one thousand, one hundred".