121659711437 has 4 divisors (see below), whose sum is σ = 132719685216. Its totient is φ = 110599737660.

The previous prime is 121659711367. The next prime is 121659711449. The reversal of 121659711437 is 734117956121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121659711437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121659711391 and 121659711400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121659711487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5529986873 + ... + 5529986894.

It is an arithmetic number, because the mean of its divisors is an integer number (33179921304).

Almost surely, 2^121659711437 is an apocalyptic number.

It is an amenable number.

121659711437 is a deficient number, since it is larger than the sum of its proper divisors (11059973779).

121659711437 is a wasteful number, since it uses less digits than its factorization.

121659711437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11059973778.

The product of its digits is 317520, while the sum is 47.

The spelling of 121659711437 in words is "one hundred twenty-one billion, six hundred fifty-nine million, seven hundred eleven thousand, four hundred thirty-seven".