13002021 has 12 divisors (see below), whose sum is σ = 18898048. Its totient is φ = 8613864.

The previous prime is 13002019. The next prime is 13002029. The reversal of 13002021 is 12020031.

It is a happy number.

It is not a de Polignac number, because 13002021 - 2¹ = 13002019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13001994 and 13002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13002029) 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 11 ways as a sum of consecutive naturals, for example, 2965 + ... + 5898.

Almost surely, 2^13002021 is an apocalyptic number.

It is an amenable number.

13002021 is a deficient number, since it is larger than the sum of its proper divisors (5896027).

13002021 is a wasteful number, since it uses less digits than its factorization.

13002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032 (or 9029 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 13002021 is about 3605.8315268465. The cubic root of 13002021 is about 235.1456528776.

Adding to 13002021 its reverse (12020031), we get a palindrome (25022052).

It can be divided in two parts, 1300 and 2021, that added together give a triangular number (3321 = T₈₁).

The spelling of 13002021 in words is "thirteen million, two thousand, twenty-one".