121200311120120 has 16 divisors (see below), whose sum is σ = 272700700020360. Its totient is φ = 48480124448032.

The previous prime is 121200311120117. The next prime is 121200311120129. The reversal of 121200311120120 is 21021113002121.

It is a happy number.

It is a super-2 number, since 2×121200311120120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200311120129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515003888962 + ... + 1515003889041.

Almost surely, 2^{121200311120120} is an apocalyptic number.

121200311120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200311120120 is an abundant number, since it is smaller than the sum of its proper divisors (151500388900240).

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

121200311120120 is a wasteful number, since it uses less digits than its factorization.

121200311120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030007778014 (or 3030007778010 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121200311120120 its reverse (21021113002121), we get a palindrome (142221424122241).

The spelling of 121200311120120 in words is "one hundred twenty-one trillion, two hundred billion, three hundred eleven million, one hundred twenty thousand, one hundred twenty".