13113021 has 16 divisors (see below), whose sum is σ = 18483200. Its totient is φ = 8246448.

The previous prime is 13113011. The next prime is 13113029. The reversal of 13113021 is 12031131.

13113021 = T₃₀₃ + T₃₀₄ + ... + T₄₇₃.

13113021 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 is not a de Polignac number, because 13113021 - 2¹³ = 13104829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13112988 and 13113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113029) 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, 21300 + ... + 21906.

It is an arithmetic number, because the mean of its divisors is an integer number (1155200).

Almost surely, 2^13113021 is an apocalyptic number.

It is an amenable number.

13113021 is a deficient number, since it is larger than the sum of its proper divisors (5370179).

13113021 is a wasteful number, since it uses less digits than its factorization.

13113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 13113021 is about 3621.1905500816. The cubic root of 13113021 is about 235.8129143074.

Adding to 13113021 its reverse (12031131), we get a palindrome (25144152).

The spelling of 13113021 in words is "thirteen million, one hundred thirteen thousand, twenty-one".