121865236053958 has 8 divisors (see below), whose sum is σ = 189101228359680. Its totient is φ = 58831493267400.

The previous prime is 121865236053943. The next prime is 121865236053971. The reversal of 121865236053958 is 859350632568121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×121865236053958² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121865236053958.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050562379718 + ... + 1050562379833.

It is an arithmetic number, because the mean of its divisors is an integer number (23637653544960).

Almost surely, 2^{121865236053958} is an apocalyptic number.

121865236053958 is a deficient number, since it is larger than the sum of its proper divisors (67235992305722).

121865236053958 is a wasteful number, since it uses less digits than its factorization.

121865236053958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101124759582.

The product of its (nonzero) digits is 93312000, while the sum is 64.

The spelling of 121865236053958 in words is "one hundred twenty-one trillion, eight hundred sixty-five billion, two hundred thirty-six million, fifty-three thousand, nine hundred fifty-eight".