22000021331 has 2 divisors, whose sum is σ = 22000021332. Its totient is φ = 22000021330.

The previous prime is 22000021297. The next prime is 22000021333. The reversal of 22000021331 is 13312000022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000021331 is a prime.

It is a super-2 number, since 2×22000021331² (a number of 21 digits) contains 22 as substring.

Together with 22000021333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22000021333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000010665 + 11000010666.

It is an arithmetic number, because the mean of its divisors is an integer number (11000010666).

Almost surely, 2^22000021331 is an apocalyptic number.

22000021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000021331 is an equidigital number, since it uses as much as digits as its factorization.

22000021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 22000021331 its reverse (13312000022), we get a palindrome (35312021353).

The spelling of 22000021331 in words is "twenty-two billion, twenty-one thousand, three hundred thirty-one".