13121901 has 12 divisors (see below), whose sum is σ = 20412028. Its totient is φ = 8074944.

The previous prime is 13121887. The next prime is 13121921. The reversal of 13121901 is 10912131.

13121901 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4862025 + 8259876 = 2205^2 + 2874^2 .

It is not a de Polignac number, because 13121901 - 2¹¹ = 13119853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55960 + ... + 56193.

Almost surely, 2^13121901 is an apocalyptic number.

It is an amenable number.

13121901 is a deficient number, since it is larger than the sum of its proper divisors (7290127).

13121901 is a wasteful number, since it uses less digits than its factorization.

13121901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112172 (or 112169 counting only the distinct ones).

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

The square root of 13121901 is about 3622.4164586640. The cubic root of 13121901 is about 235.8661323054.

The spelling of 13121901 in words is "thirteen million, one hundred twenty-one thousand, nine hundred one".