121202020120 has 32 divisors (see below), whose sum is σ = 275253195600. Its totient is φ = 48027714688.

The previous prime is 121202020099. The next prime is 121202020123. The reversal of 121202020120 is 21020202121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121202020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202020123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14154835 + ... + 14163394.

Almost surely, 2^121202020120 is an apocalyptic number.

121202020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121202020120 is an abundant number, since it is smaller than the sum of its proper divisors (154051175480).

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

121202020120 is a wasteful number, since it uses less digits than its factorization.

121202020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28318347 (or 28318343 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121202020120 its reverse (21020202121), we get a palindrome (142222222241).

The spelling of 121202020120 in words is "one hundred twenty-one billion, two hundred two million, twenty thousand, one hundred twenty".