221331319331 has 2 divisors, whose sum is σ = 221331319332. Its totient is φ = 221331319330.

The previous prime is 221331319277. The next prime is 221331319381. The reversal of 221331319331 is 133913133122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221331319331 - 2⁶ = 221331319267 is a prime.

It is a super-2 number, since 2×221331319331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221331319381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110665659665 + 110665659666.

It is an arithmetic number, because the mean of its divisors is an integer number (110665659666).

Almost surely, 2^221331319331 is an apocalyptic number.

221331319331 is a deficient number, since it is larger than the sum of its proper divisors (1).

221331319331 is an equidigital number, since it uses as much as digits as its factorization.

221331319331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 32.

The spelling of 221331319331 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred nineteen thousand, three hundred thirty-one".