13121091 has 24 divisors (see below), whose sum is σ = 19768320. Its totient is φ = 8377200.

The previous prime is 13121083. The next prime is 13121099. The reversal of 13121091 is 19012131.

It is an interprime number because it is at equal distance from previous prime (13121083) and next prime (13121099).

It is not a de Polignac number, because 13121091 - 2³ = 13121083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13121099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36370 + ... + 36728.

It is an arithmetic number, because the mean of its divisors is an integer number (823680).

Almost surely, 2^13121091 is an apocalyptic number.

13121091 is a deficient number, since it is larger than the sum of its proper divisors (6647229).

13121091 is a wasteful number, since it uses less digits than its factorization.

13121091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 13121091 is about 3622.3046531180. The cubic root of 13121091 is about 235.8612789563.

It can be divided in two parts, 13 and 121091, that added together give a square (121104 = 348²).

The spelling of 13121091 in words is "thirteen million, one hundred twenty-one thousand, ninety-one".