121313321100 has 54 divisors (see below), whose sum is σ = 380249868180. Its totient is φ = 32350218720.

The previous prime is 121313321093. The next prime is 121313321113. The reversal of 121313321100 is 1123313121.

121313321100 is a `hidden beast` number, since 1 + 21 + 313 + 321 + 10 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67395390 + ... + 67397189.

Almost surely, 2^121313321100 is an apocalyptic number.

121313321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121313321100 is an abundant number, since it is smaller than the sum of its proper divisors (258936547080).

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

121313321100 is a wasteful number, since it uses less digits than its factorization.

121313321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134792599 (or 134792589 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121313321100 its reverse (1123313121), we get a palindrome (122436634221).

The spelling of 121313321100 in words is "one hundred twenty-one billion, three hundred thirteen million, three hundred twenty-one thousand, one hundred".