121100121012120 has 128 divisors (see below), whose sum is σ = 375283287613440. Its totient is φ = 31229680965120.

The previous prime is 121100121012119. The next prime is 121100121012149. The reversal of 121100121012120 is 21210121001121.

It is a happy number.

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 121100121012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6144879 + ... + 16731998.

It is an arithmetic number, because the mean of its divisors is an integer number (2931900684480).

Almost surely, 2^{121100121012120} is an apocalyptic number.

121100121012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100121012120 is an abundant number, since it is smaller than the sum of its proper divisors (254183166601320).

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

121100121012120 is a wasteful number, since it uses less digits than its factorization.

121100121012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22878345 (or 22878341 counting only the distinct ones).

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

Adding to 121100121012120 its reverse (21210121001121), we get a palindrome (142310242013241).

The spelling of 121100121012120 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty-one million, twelve thousand, one hundred twenty".