121557512701 has 16 divisors (see below), whose sum is σ = 126626693760. Its totient is φ = 116549697600.

The previous prime is 121557512689. The next prime is 121557512729. The reversal of 121557512701 is 107215755121.

It is a cyclic number.

It is not a de Polignac number, because 121557512701 - 2²¹ = 121555415549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121557512731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379376 + ... + 2429926.

It is an arithmetic number, because the mean of its divisors is an integer number (7914168360).

Almost surely, 2^121557512701 is an apocalyptic number.

It is an amenable number.

121557512701 is a deficient number, since it is larger than the sum of its proper divisors (5069181059).

121557512701 is a wasteful number, since it uses less digits than its factorization.

121557512701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51156.

The product of its (nonzero) digits is 24500, while the sum is 37.

The spelling of 121557512701 in words is "one hundred twenty-one billion, five hundred fifty-seven million, five hundred twelve thousand, seven hundred one".