121002120100120 has 128 divisors (see below), whose sum is σ = 311437178173440. Its totient is φ = 41447939212800.

The previous prime is 121002120100097. The next prime is 121002120100123. The reversal of 121002120100120 is 21001021200121.

It is a super-3 number, since 3×121002120100120³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121002120100120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002120100123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1813194274 + ... + 1813261006.

It is an arithmetic number, because the mean of its divisors is an integer number (2433102954480).

Almost surely, 2^{121002120100120} is an apocalyptic number.

121002120100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002120100120 is an abundant number, since it is smaller than the sum of its proper divisors (190435058073320).

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

121002120100120 is a wasteful number, since it uses less digits than its factorization.

121002120100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72665 (or 72661 counting only the distinct ones).

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

Adding to 121002120100120 its reverse (21001021200121), we get a palindrome (142003141300241).

The spelling of 121002120100120 in words is "one hundred twenty-one trillion, two billion, one hundred twenty million, one hundred thousand, one hundred twenty".