121200221020120 has 64 divisors (see below), whose sum is σ = 298374215911200. Its totient is φ = 43942027745280.

The previous prime is 121200221020111. The next prime is 121200221020183. The reversal of 121200221020120 is 21020122002121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121200221020094 and 121200221020103.

It is a congruent number.

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, 408538735 + ... + 408835294.

Almost surely, 2^{121200221020120} is an apocalyptic number.

121200221020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200221020120 is an abundant number, since it is smaller than the sum of its proper divisors (177173994891080).

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

121200221020120 is a wasteful number, since it uses less digits than its factorization.

121200221020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817374388 (or 817374384 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121200221020120 its reverse (21020122002121), we get a palindrome (142220343022241).

The spelling of 121200221020120 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty-one million, twenty thousand, one hundred twenty".