13671636121 has 16 divisors (see below), whose sum is σ = 16242266880. Its totient is φ = 11343784320.

The previous prime is 13671636119. The next prime is 13671636179. The reversal of 13671636121 is 12163617631.

It is not a de Polignac number, because 13671636121 - 2¹ = 13671636119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13671636101) 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, 524385 + ... + 549838.

It is an arithmetic number, because the mean of its divisors is an integer number (1015141680).

Almost surely, 2^13671636121 is an apocalyptic number.

13671636121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13671636121 is a deficient number, since it is larger than the sum of its proper divisors (2570630759).

13671636121 is a wasteful number, since it uses less digits than its factorization.

13671636121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074336.

The product of its digits is 27216, while the sum is 37.

The spelling of 13671636121 in words is "thirteen billion, six hundred seventy-one million, six hundred thirty-six thousand, one hundred twenty-one".