13163954121 has 6 divisors (see below), whose sum is σ = 19014600410. Its totient is φ = 8775969408.

The previous prime is 13163954107. The next prime is 13163954123. The reversal of 13163954121 is 12145936131.

13163954121 is a `hidden beast` number, since 1 + 3 + 1 + 639 + 5 + 4 + 12 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11934470025 + 1229484096 = 109245^2 + 35064^2 .

It is not a de Polignac number, because 13163954121 - 2⁶ = 13163954057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13163954123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 731330776 + ... + 731330793.

Almost surely, 2^13163954121 is an apocalyptic number.

It is an amenable number.

13163954121 is a deficient number, since it is larger than the sum of its proper divisors (5850646289).

13163954121 is a wasteful number, since it uses less digits than its factorization.

13163954121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462661575 (or 1462661572 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The spelling of 13163954121 in words is "thirteen billion, one hundred sixty-three million, nine hundred fifty-four thousand, one hundred twenty-one".