21201302013 has 4 divisors (see below), whose sum is σ = 28268402688. Its totient is φ = 14134201340.

The previous prime is 21201301999. The next prime is 21201302027. The reversal of 21201302013 is 31020310212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21201301999) and next prime (21201302027).

It is a cyclic number.

It is not a de Polignac number, because 21201302013 - 2²¹ = 21199204861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201301983 and 21201302001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201302063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533550333 + ... + 3533550338.

It is an arithmetic number, because the mean of its divisors is an integer number (7067100672).

Almost surely, 2^21201302013 is an apocalyptic number.

It is an amenable number.

21201302013 is a deficient number, since it is larger than the sum of its proper divisors (7067100675).

21201302013 is an equidigital number, since it uses as much as digits as its factorization.

21201302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067100674.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21201302013 its reverse (31020310212), we get a palindrome (52221612225).

The spelling of 21201302013 in words is "twenty-one billion, two hundred one million, three hundred two thousand, thirteen".