21231232013011 has 4 divisors (see below), whose sum is σ = 21320065620000. Its totient is φ = 21142398406024.

The previous prime is 21231232012987. The next prime is 21231232013053. The reversal of 21231232013011 is 11031023213212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21231232013011 - 2²¹ = 21231229915859 is a prime.

It is a super-2 number, since 2×21231232013011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231232013111) 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, 44416803136 + ... + 44416803613.

It is an arithmetic number, because the mean of its divisors is an integer number (5330016405000).

Almost surely, 2^{21231232013011} is an apocalyptic number.

21231232013011 is a deficient number, since it is larger than the sum of its proper divisors (88833606989).

21231232013011 is an equidigital number, since it uses as much as digits as its factorization.

21231232013011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88833606988.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21231232013011 its reverse (11031023213212), we get a palindrome (32262255226223).

The spelling of 21231232013011 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-two million, thirteen thousand, eleven".