21201020013 has 8 divisors (see below), whose sum is σ = 28272669376. Its totient is φ = 14131692000.

The previous prime is 21201020003. The next prime is 21201020023. The reversal of 21201020013 is 31002010212.

It is an interprime number because it is at equal distance from previous prime (21201020003) and next prime (21201020023).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21201020013 - 2⁴ = 21201019997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201020003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 558913 + ... + 595638.

It is an arithmetic number, because the mean of its divisors is an integer number (3534083672).

Almost surely, 2^21201020013 is an apocalyptic number.

It is an amenable number.

21201020013 is a deficient number, since it is larger than the sum of its proper divisors (7071649363).

21201020013 is a wasteful number, since it uses less digits than its factorization.

21201020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160675.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21201020013 its reverse (31002010212), we get a palindrome (52203030225).

The spelling of 21201020013 in words is "twenty-one billion, two hundred one million, twenty thousand, thirteen".