21223000311 has 16 divisors (see below), whose sum is σ = 30771666144. Its totient is φ = 12956488704.

The previous prime is 21223000291. The next prime is 21223000319. The reversal of 21223000311 is 11300032212.

It is not a de Polignac number, because 21223000311 - 2²¹ = 21220903159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223000319) 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, 5621590 + ... + 5625363.

It is an arithmetic number, because the mean of its divisors is an integer number (1923229134).

Almost surely, 2^21223000311 is an apocalyptic number.

21223000311 is a deficient number, since it is larger than the sum of its proper divisors (9548665833).

21223000311 is a wasteful number, since it uses less digits than its factorization.

21223000311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11247010.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21223000311 its reverse (11300032212), we get a palindrome (32523032523).

The spelling of 21223000311 in words is "twenty-one billion, two hundred twenty-three million, three hundred eleven", and thus it is an aban number.