21222331331 has 8 divisors (see below), whose sum is σ = 21577682928. Its totient is φ = 20867220000.

The previous prime is 21222331307. The next prime is 21222331343. The reversal of 21222331331 is 13313322212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222331331 is a prime.

It is a super-2 number, since 2×21222331331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222331297 and 21222331306.

It is not an unprimeable number, because it can be changed into a prime (21222331301) 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, 122681 + ... + 239781.

It is an arithmetic number, because the mean of its divisors is an integer number (2697210366).

Almost surely, 2^21222331331 is an apocalyptic number.

21222331331 is a deficient number, since it is larger than the sum of its proper divisors (355351597).

21222331331 is a wasteful number, since it uses less digits than its factorization.

21222331331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120133.

The product of its digits is 1296, while the sum is 23.

Adding to 21222331331 its reverse (13313322212), we get a palindrome (34535653543).

The spelling of 21222331331 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, three hundred thirty-one".