121751560620 has 96 divisors (see below), whose sum is σ = 378833112000. Its totient is φ = 32462756352.

The previous prime is 121751560583. The next prime is 121751560631. The reversal of 121751560620 is 26065157121.

121751560620 is a `hidden beast` number, since 1 + 2 + 1 + 75 + 1 + 560 + 6 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7848712 + ... + 7864208.

It is an arithmetic number, because the mean of its divisors is an integer number (3946178250).

Almost surely, 2^121751560620 is an apocalyptic number.

121751560620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121751560620 is an abundant number, since it is smaller than the sum of its proper divisors (257081551380).

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

121751560620 is a wasteful number, since it uses less digits than its factorization.

121751560620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30064 (or 30056 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 121751560620 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred sixty thousand, six hundred twenty".