121560617601 has 24 divisors (see below), whose sum is σ = 179713550016. Its totient is φ = 79137001440.

The previous prime is 121560617599. The next prime is 121560617603. The reversal of 121560617601 is 106716065121.

It is a happy number.

121560617601 is a `hidden beast` number, since 1 + 21 + 560 + 6 + 1 + 76 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (121560617599) and next prime (121560617603).

It is not a de Polignac number, because 121560617601 - 2¹ = 121560617599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121560617603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1703836 + ... + 1773746.

It is an arithmetic number, because the mean of its divisors is an integer number (7488064584).

Almost surely, 2^121560617601 is an apocalyptic number.

It is an amenable number.

121560617601 is a deficient number, since it is larger than the sum of its proper divisors (58152932415).

121560617601 is a wasteful number, since it uses less digits than its factorization.

121560617601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74453 (or 74450 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 121560617601 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred seventeen thousand, six hundred one".