221222010631 has 2 divisors, whose sum is σ = 221222010632. Its totient is φ = 221222010630.

The previous prime is 221222010629. The next prime is 221222010643. The reversal of 221222010631 is 136010222122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221222010631 - 2¹ = 221222010629 is a prime.

It is a super-2 number, since 2×221222010631² (a number of 23 digits) contains 22 as substring.

Together with 221222010629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222011631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611005315 + 110611005316.

It is an arithmetic number, because the mean of its divisors is an integer number (110611005316).

Almost surely, 2^221222010631 is an apocalyptic number.

221222010631 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222010631 is an equidigital number, since it uses as much as digits as its factorization.

221222010631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 221222010631 its reverse (136010222122), we get a palindrome (357232232753).

The spelling of 221222010631 in words is "two hundred twenty-one billion, two hundred twenty-two million, ten thousand, six hundred thirty-one".