121756673472 has 56 divisors (see below), whose sum is σ = 368168992896. Its totient is φ = 34787620608.

The previous prime is 121756673431. The next prime is 121756673473. The reversal of 121756673472 is 274376657121.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121756673473) 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, 45295038 + ... + 45297725.

Almost surely, 2^121756673472 is an apocalyptic number.

121756673472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121756673472 is an abundant number, since it is smaller than the sum of its proper divisors (246412319424).

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

121756673472 is an equidigital number, since it uses as much as digits as its factorization.

121756673472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90592785 (or 90592775 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 51.

The spelling of 121756673472 in words is "one hundred twenty-one billion, seven hundred fifty-six million, six hundred seventy-three thousand, four hundred seventy-two".