21223013111311 has 16 divisors (see below), whose sum is σ = 24379927724160. Its totient is φ = 18271440427680.

The previous prime is 21223013111227. The next prime is 21223013111317. The reversal of 21223013111311 is 11311131032212.

It is a de Polignac number, because none of the positive numbers 2^k-21223013111311 is a prime.

It is a super-2 number, since 2×21223013111311² (a number of 27 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 (21223013111317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18190336 + ... + 19321861.

It is an arithmetic number, because the mean of its divisors is an integer number (1523745482760).

Almost surely, 2^{21223013111311} is an apocalyptic number.

21223013111311 is a deficient number, since it is larger than the sum of its proper divisors (3156914612849).

21223013111311 is a wasteful number, since it uses less digits than its factorization.

21223013111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37514934.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21223013111311 its reverse (11311131032212), we get a palindrome (32534144143523).

The spelling of 21223013111311 in words is "twenty-one trillion, two hundred twenty-three billion, thirteen million, one hundred eleven thousand, three hundred eleven".