121220122220120 has 64 divisors (see below), whose sum is σ = 340046057145600. Its totient is φ = 37782895236480.

The previous prime is 121220122220117. The next prime is 121220122220149. The reversal of 121220122220120 is 21022221022121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121220122220092 and 121220122220101.

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, 19678588190 + ... + 19678594349.

It is an arithmetic number, because the mean of its divisors is an integer number (5313219642900).

Almost surely, 2^{121220122220120} is an apocalyptic number.

121220122220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220122220120 is an abundant number, since it is smaller than the sum of its proper divisors (218825934925480).

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

121220122220120 is a wasteful number, since it uses less digits than its factorization.

121220122220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39357182568 (or 39357182564 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121220122220120 its reverse (21022221022121), we get a palindrome (142242343242241).

The spelling of 121220122220120 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty".