21122122313 has 8 divisors (see below), whose sum is σ = 21362227200. Its totient is φ = 20882079328.

The previous prime is 21122122303. The next prime is 21122122337. The reversal of 21122122313 is 31322122112.

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 21122122313 - 2⁸ = 21122122057 is a prime.

It is a super-2 number, since 2×21122122313² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122122303) 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, 1286168 + ... + 1302486.

It is an arithmetic number, because the mean of its divisors is an integer number (2670278400).

Almost surely, 2^21122122313 is an apocalyptic number.

It is an amenable number.

21122122313 is a deficient number, since it is larger than the sum of its proper divisors (240104887).

21122122313 is a wasteful number, since it uses less digits than its factorization.

21122122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30951.

The product of its digits is 288, while the sum is 20.

Adding to 21122122313 its reverse (31322122112), we get a palindrome (52444244425).

The spelling of 21122122313 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty-two thousand, three hundred thirteen".