121751552601 has 32 divisors (see below), whose sum is σ = 206362387200. Its totient is φ = 69497326080.

The previous prime is 121751552599. The next prime is 121751552603. The reversal of 121751552601 is 106255157121.

121751552601 is a `hidden beast` number, since 121 + 7 + 5 + 1 + 5 + 526 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (121751552599) and next prime (121751552603).

It is not a de Polignac number, because 121751552601 - 2¹ = 121751552599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121751552603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171130 + ... + 522291.

It is an arithmetic number, because the mean of its divisors is an integer number (6448824600).

Almost surely, 2^121751552601 is an apocalyptic number.

It is an amenable number.

121751552601 is a deficient number, since it is larger than the sum of its proper divisors (84610834599).

121751552601 is an equidigital number, since it uses as much as digits as its factorization.

121751552601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694366 (or 694360 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 121751552601 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred fifty-two thousand, six hundred one".