121220110002120 has 64 divisors (see below), whose sum is σ = 363768146320320. Its totient is φ = 32315778994944.

The previous prime is 121220110002083. The next prime is 121220110002143. The reversal of 121220110002120 is 21200011022121.

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 121220110002120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149338434 + ... + 150147953.

It is an arithmetic number, because the mean of its divisors is an integer number (5683877286255).

Almost surely, 2^{121220110002120} is an apocalyptic number.

121220110002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220110002120 is an abundant number, since it is smaller than the sum of its proper divisors (242548036318200).

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

121220110002120 is a wasteful number, since it uses less digits than its factorization.

121220110002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299489774 (or 299489770 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121220110002120 its reverse (21200011022121), we get a palindrome (142420121024241).

The spelling of 121220110002120 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred ten million, two thousand, one hundred twenty".