121220202100120 has 16 divisors (see below), whose sum is σ = 272745454725360. Its totient is φ = 48488080840032.

The previous prime is 121220202100117. The next prime is 121220202100219. The reversal of 121220202100120 is 21001202022121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121220202100094 and 121220202100103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515252526212 + ... + 1515252526291.

It is an arithmetic number, because the mean of its divisors is an integer number (17046590920335).

Almost surely, 2^{121220202100120} is an apocalyptic number.

121220202100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220202100120 is an abundant number, since it is smaller than the sum of its proper divisors (151525252625240).

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

121220202100120 is a wasteful number, since it uses less digits than its factorization.

121220202100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030505052514 (or 3030505052510 counting only the distinct ones).

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

Adding to 121220202100120 its reverse (21001202022121), we get a palindrome (142221404122241).

The spelling of 121220202100120 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred thousand, one hundred twenty".