21132001013 has 4 divisors (see below), whose sum is σ = 21154316640. Its totient is φ = 21109685388.

The previous prime is 21132000971. The next prime is 21132001049. The reversal of 21132001013 is 31010023112.

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 a cyclic number.

It is not a de Polignac number, because 21132001013 - 2¹² = 21131996917 is a prime.

It is a super-2 number, since 2×21132001013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132001063) 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, 11156393 + ... + 11158286.

It is an arithmetic number, because the mean of its divisors is an integer number (5288579160).

Almost surely, 2^21132001013 is an apocalyptic number.

It is an amenable number.

21132001013 is a deficient number, since it is larger than the sum of its proper divisors (22315627).

21132001013 is an equidigital number, since it uses as much as digits as its factorization.

21132001013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22315626.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21132001013 its reverse (31010023112), we get a palindrome (52142024125).

The spelling of 21132001013 in words is "twenty-one billion, one hundred thirty-two million, one thousand, thirteen".