121011210012120 has 128 divisors (see below), whose sum is σ = 363746972160000. Its totient is φ = 32206253480960.

The previous prime is 121011210012107. The next prime is 121011210012191. The reversal of 121011210012120 is 21210012110121.

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 121011210012120.

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, 2682022921 + ... + 2682068039.

It is an arithmetic number, because the mean of its divisors is an integer number (2841773220000).

Almost surely, 2^{121011210012120} is an apocalyptic number.

121011210012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011210012120 is an abundant number, since it is smaller than the sum of its proper divisors (242735762147880).

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

121011210012120 is a wasteful number, since it uses less digits than its factorization.

121011210012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88553 (or 88549 counting only the distinct ones).

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

Adding to 121011210012120 its reverse (21210012110121), we get a palindrome (142221222122241).

The spelling of 121011210012120 in words is "one hundred twenty-one trillion, eleven billion, two hundred ten million, twelve thousand, one hundred twenty".