21222332331 has 8 divisors (see below), whose sum is σ = 28325588544. Its totient is φ = 14133648840.

The previous prime is 21222332281. The next prime is 21222332371. The reversal of 21222332331 is 13323322212.

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

It is not a de Polignac number, because 21222332331 - 2⁶ = 21222332267 is a prime.

It is a super-2 number, since 2×21222332331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222332371) 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, 3639781 + ... + 3645606.

It is an arithmetic number, because the mean of its divisors is an integer number (3540698568).

Almost surely, 2^21222332331 is an apocalyptic number.

21222332331 is a deficient number, since it is larger than the sum of its proper divisors (7103256213).

21222332331 is an equidigital number, since it uses as much as digits as its factorization.

21222332331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286361.

The product of its digits is 2592, while the sum is 24.

Adding to 21222332331 its reverse (13323322212), we get a palindrome (34545654543).

The spelling of 21222332331 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-two thousand, three hundred thirty-one".