21122313331 has 24 divisors (see below), whose sum is σ = 24693439680. Its totient is φ = 18014773392.

The previous prime is 21122313301. The next prime is 21122313343. The reversal of 21122313331 is 13331322112.

It is not a de Polignac number, because 21122313331 - 2²⁹ = 20585442419 is a prime.

It is a super-2 number, since 2×21122313331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122313301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9586876 + ... + 9589078.

It is an arithmetic number, because the mean of its divisors is an integer number (1028893320).

Almost surely, 2^21122313331 is an apocalyptic number.

21122313331 is a deficient number, since it is larger than the sum of its proper divisors (3571126349).

21122313331 is a wasteful number, since it uses less digits than its factorization.

21122313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103 (or 3096 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21122313331 its reverse (13331322112), we get a palindrome (34453635443).

The spelling of 21122313331 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirteen thousand, three hundred thirty-one".