13012021 has 16 divisors (see below), whose sum is σ = 15163200. Its totient is φ = 11034880.

The previous prime is 13012019. The next prime is 13012061. The reversal of 13012021 is 12021031.

It is a cyclic number.

It is not a de Polignac number, because 13012021 - 2¹ = 13012019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13011989 and 13012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27630 + ... + 28096.

It is an arithmetic number, because the mean of its divisors is an integer number (947700).

Almost surely, 2^13012021 is an apocalyptic number.

13012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13012021 is a deficient number, since it is larger than the sum of its proper divisors (2151179).

13012021 is a wasteful number, since it uses less digits than its factorization.

13012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 13012021 is about 3607.2179030383. The cubic root of 13012021 is about 235.2059218144.

Adding to 13012021 its reverse (12021031), we get a palindrome (25033052).

The spelling of 13012021 in words is "thirteen million, twelve thousand, twenty-one".