121231200100 has 36 divisors (see below), whose sum is σ = 263087005104. Its totient is φ = 48489659680.

The previous prime is 121231200047. The next prime is 121231200109. The reversal of 121231200100 is 1002132121.

121231200100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (121231200109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2951907 + ... + 2992693.

It is an arithmetic number, because the mean of its divisors is an integer number (7307972364).

Almost surely, 2^121231200100 is an apocalyptic number.

121231200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121231200100 is an abundant number, since it is smaller than the sum of its proper divisors (141855805004).

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

121231200100 is a wasteful number, since it uses less digits than its factorization.

121231200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70524 (or 70517 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121231200100 its reverse (1002132121), we get a palindrome (122233332221).

The spelling of 121231200100 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred thousand, one hundred".