2101121200120 has 32 divisors (see below), whose sum is σ = 4745097158400. Its totient is φ = 837324131968.

The previous prime is 2101121200109. The next prime is 2101121200147. The reversal of 2101121200120 is 210021211012.

It is a self number, because there is not a number n which added to its sum of digits gives 2101121200120.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97624984 + ... + 97646503.

It is an arithmetic number, because the mean of its divisors is an integer number (148284286200).

Almost surely, 2^{2101121200120} is an apocalyptic number.

2101121200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101121200120 is an abundant number, since it is smaller than the sum of its proper divisors (2643975958280).

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

2101121200120 is a wasteful number, since it uses less digits than its factorization.

2101121200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195271767 (or 195271763 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101121200120 its reverse (210021211012), we get a palindrome (2311142411132).

The spelling of 2101121200120 in words is "two trillion, one hundred one billion, one hundred twenty-one million, two hundred thousand, one hundred twenty".