21023302311 has 48 divisors (see below), whose sum is σ = 35106009120. Its totient is φ = 12001920000.

The previous prime is 21023302309. The next prime is 21023302319. The reversal of 21023302311 is 11320332012.

21023302311 is a `hidden beast` number, since 2 + 102 + 330 + 231 + 1 = 666.

It is not a de Polignac number, because 21023302311 - 2¹ = 21023302309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023302319) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28411 + ... + 207011.

It is an arithmetic number, because the mean of its divisors is an integer number (731375190).

Almost surely, 2^21023302311 is an apocalyptic number.

21023302311 is a deficient number, since it is larger than the sum of its proper divisors (14082706809).

21023302311 is a wasteful number, since it uses less digits than its factorization.

21023302311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178688 (or 178685 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023302311 its reverse (11320332012), we get a palindrome (32343634323).

The spelling of 21023302311 in words is "twenty-one billion, twenty-three million, three hundred two thousand, three hundred eleven".