975556679022121 has 16 divisors (see below), whose sum is σ = 1140213417546240. Its totient is φ = 817432413220800.

The previous prime is 975556679022061. The next prime is 975556679022157. The reversal of 975556679022121 is 121220976655579.

It is a cyclic number.

It is not a de Polignac number, because 975556679022121 - 2¹³ = 975556679013929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (975556679022221) 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, 8733196426 + ... + 8733308131.

It is an arithmetic number, because the mean of its divisors is an integer number (71263338596640).

Almost surely, 2^{975556679022121} is an apocalyptic number.

It is an amenable number.

975556679022121 is a deficient number, since it is larger than the sum of its proper divisors (164656738524119).

975556679022121 is a wasteful number, since it uses less digits than its factorization.

975556679022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17466504744.

The product of its (nonzero) digits is 142884000, while the sum is 67.

The spelling of 975556679022121 in words is "nine hundred seventy-five trillion, five hundred fifty-six billion, six hundred seventy-nine million, twenty-two thousand, one hundred twenty-one".