21222554542331 has 2 divisors, whose sum is σ = 21222554542332. Its totient is φ = 21222554542330.

The previous prime is 21222554542309. The next prime is 21222554542333. The reversal of 21222554542331 is 13324545522212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222554542331 - 2¹⁴ = 21222554525947 is a prime.

It is a super-2 number, since 2×21222554542331² (a number of 27 digits) contains 22 as substring.

Together with 21222554542333, 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 (21222554542333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611277271165 + 10611277271166.

It is an arithmetic number, because the mean of its divisors is an integer number (10611277271166).

Almost surely, 2^{21222554542331} is an apocalyptic number.

21222554542331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222554542331 is an equidigital number, since it uses as much as digits as its factorization.

21222554542331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 41.

The spelling of 21222554542331 in words is "twenty-one trillion, two hundred twenty-two billion, five hundred fifty-four million, five hundred forty-two thousand, three hundred thirty-one".