121157136511 has 16 divisors (see below), whose sum is σ = 132131087136. Its totient is φ = 110628412416.

The previous prime is 121157136491. The next prime is 121157136523. The reversal of 121157136511 is 115631751121.

It is a cyclic number.

It is not a de Polignac number, because 121157136511 - 2⁷ = 121157136383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121157130511) 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, 59286 + ... + 495811.

It is an arithmetic number, because the mean of its divisors is an integer number (8258192946).

Almost surely, 2^121157136511 is an apocalyptic number.

121157136511 is a deficient number, since it is larger than the sum of its proper divisors (10973950625).

121157136511 is a wasteful number, since it uses less digits than its factorization.

121157136511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555498.

The product of its digits is 6300, while the sum is 34.

Adding to 121157136511 its reverse (115631751121), we get a palindrome (236788887632).

The spelling of 121157136511 in words is "one hundred twenty-one billion, one hundred fifty-seven million, one hundred thirty-six thousand, five hundred eleven".