21223001311 has 8 divisors (see below), whose sum is σ = 22761511920. Its totient is φ = 19726641792.

The previous prime is 21223001309. The next prime is 21223001329. The reversal of 21223001311 is 11310032212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223001311 - 2¹ = 21223001309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223001341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10536730 + ... + 10538743.

It is an arithmetic number, because the mean of its divisors is an integer number (2845188990).

Almost surely, 2^21223001311 is an apocalyptic number.

21223001311 is a deficient number, since it is larger than the sum of its proper divisors (1538510609).

21223001311 is a wasteful number, since it uses less digits than its factorization.

21223001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21075545.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21223001311 its reverse (11310032212), we get a palindrome (32533033523).

The spelling of 21223001311 in words is "twenty-one billion, two hundred twenty-three million, one thousand, three hundred eleven".