13163112521 has 16 divisors (see below), whose sum is σ = 14394377088. Its totient is φ = 11963548800.

The previous prime is 13163112509. The next prime is 13163112533. The reversal of 13163112521 is 12521136131.

It is an interprime number because it is at equal distance from previous prime (13163112509) and next prime (13163112533).

It is a cyclic number.

It is not a de Polignac number, because 13163112521 - 2¹⁴ = 13163096137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13163142521) 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, 717341 + ... + 735461.

It is an arithmetic number, because the mean of its divisors is an integer number (899648568).

Almost surely, 2^13163112521 is an apocalyptic number.

It is an amenable number.

13163112521 is a deficient number, since it is larger than the sum of its proper divisors (1231264567).

13163112521 is a wasteful number, since it uses less digits than its factorization.

13163112521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18992.

The product of its digits is 1080, while the sum is 26.

Adding to 13163112521 its reverse (12521136131), we get a palindrome (25684248652).

The spelling of 13163112521 in words is "thirteen billion, one hundred sixty-three million, one hundred twelve thousand, five hundred twenty-one".