121220463633720 has 128 divisors (see below), whose sum is σ = 396775532160000. Its totient is φ = 29382777966080.

The previous prime is 121220463633707. The next prime is 121220463633751. The reversal of 121220463633720 is 27336364022121.

121220463633720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3452641 + ... + 15948719.

It is an arithmetic number, because the mean of its divisors is an integer number (3099808845000).

Almost surely, 2^{121220463633720} is an apocalyptic number.

121220463633720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220463633720 is an abundant number, since it is smaller than the sum of its proper divisors (275555068526280).

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

121220463633720 is a wasteful number, since it uses less digits than its factorization.

121220463633720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12503453 (or 12503449 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 121220463633720 in words is "one hundred twenty-one trillion, two hundred twenty billion, four hundred sixty-three million, six hundred thirty-three thousand, seven hundred twenty".