121736001957 has 8 divisors (see below), whose sum is σ = 162319728480. Its totient is φ = 81154805040.

The previous prime is 121736001949. The next prime is 121736001971. The reversal of 121736001957 is 759100637121.

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

It is not a de Polignac number, because 121736001957 - 2³ = 121736001949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121736000957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517107 + ... + 714752.

It is an arithmetic number, because the mean of its divisors is an integer number (20289966060).

Almost surely, 2^121736001957 is an apocalyptic number.

It is an amenable number.

121736001957 is a deficient number, since it is larger than the sum of its proper divisors (40583726523).

121736001957 is a wasteful number, since it uses less digits than its factorization.

121736001957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264803.

The product of its (nonzero) digits is 79380, while the sum is 42.

The spelling of 121736001957 in words is "one hundred twenty-one billion, seven hundred thirty-six million, one thousand, nine hundred fifty-seven".