31222101173 has 2 divisors, whose sum is σ = 31222101174. Its totient is φ = 31222101172.

The previous prime is 31222101121. The next prime is 31222101193. The reversal of 31222101173 is 37110122213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18949449649 + 12272651524 = 137657^2 + 110782^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222101173 - 2⁶ = 31222101109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31222101193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611050586 + 15611050587.

It is an arithmetic number, because the mean of its divisors is an integer number (15611050587).

Almost surely, 2^31222101173 is an apocalyptic number.

It is an amenable number.

31222101173 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222101173 is an equidigital number, since it uses as much as digits as its factorization.

31222101173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 31222101173 its reverse (37110122213), we get a palindrome (68332223386).

The spelling of 31222101173 in words is "thirty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred seventy-three".