121210120112100 has 144 divisors (see below), whose sum is σ = 369168920635200. Its totient is φ = 30620701278720.

The previous prime is 121210120112017. The next prime is 121210120112131. The reversal of 121210120112100 is 1211021012121.

It is a happy number.

121210120112100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 121210120112100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 234519162 + ... + 235035438.

Almost surely, 2^{121210120112100} is an apocalyptic number.

121210120112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210120112100 is an abundant number, since it is smaller than the sum of its proper divisors (247958800523100).

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

121210120112100 is a wasteful number, since it uses less digits than its factorization.

121210120112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557502 (or 557495 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121210120112100 its reverse (1211021012121), we get a palindrome (122421141124221).

The spelling of 121210120112100 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, one hundred twelve thousand, one hundred".