121156040475 has 18 divisors (see below), whose sum is σ = 217003930676. Its totient is φ = 64616554800.

The previous prime is 121156040443. The next prime is 121156040479. The reversal of 121156040475 is 574040651121.

121156040475 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 5 + 604 + 0 + 47 + 5 = 666.

It is not a de Polignac number, because 121156040475 - 2⁵ = 121156040443 is a prime.

It is a super-2 number, since 2×121156040475² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121156040479) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 269235421 + ... + 269235870.

Almost surely, 2^121156040475 is an apocalyptic number.

121156040475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121156040475 is a deficient number, since it is larger than the sum of its proper divisors (95847890201).

121156040475 is a wasteful number, since it uses less digits than its factorization.

121156040475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538471307 (or 538471299 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

Adding to 121156040475 its reverse (574040651121), we get a palindrome (695196691596).

The spelling of 121156040475 in words is "one hundred twenty-one billion, one hundred fifty-six million, forty thousand, four hundred seventy-five".