21223110133013 has 4 divisors (see below), whose sum is σ = 21954941516940. Its totient is φ = 20491278749088.

The previous prime is 21223110133009. The next prime is 21223110133019. The reversal of 21223110133013 is 31033101132212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13170642623044 + 8052467509969 = 3629138^2 + 2837687^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223110133013 - 2² = 21223110133009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21223110133013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223110133019) 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, 365915691920 + ... + 365915691977.

It is an arithmetic number, because the mean of its divisors is an integer number (5488735379235).

Almost surely, 2^{21223110133013} is an apocalyptic number.

It is an amenable number.

21223110133013 is a deficient number, since it is larger than the sum of its proper divisors (731831383927).

21223110133013 is an equidigital number, since it uses as much as digits as its factorization.

21223110133013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731831383926.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21223110133013 its reverse (31033101132212), we get a palindrome (52256211265225).

The spelling of 21223110133013 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred ten million, one hundred thirty-three thousand, thirteen".