121751535072 has 48 divisors (see below), whose sum is σ = 321271114752. Its totient is φ = 40371358080.

The previous prime is 121751535067. The next prime is 121751535083. The reversal of 121751535072 is 270535157121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 121751535072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3301678 + ... + 3338349.

It is an arithmetic number, because the mean of its divisors is an integer number (6693148224).

Almost surely, 2^121751535072 is an apocalyptic number.

121751535072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121751535072 is an abundant number, since it is smaller than the sum of its proper divisors (199519579680).

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

121751535072 is a wasteful number, since it uses less digits than its factorization.

121751535072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640231 (or 6640223 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 121751535072 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred thirty-five thousand, seventy-two".