31222354354981 has 2 divisors, whose sum is σ = 31222354354982. Its totient is φ = 31222354354980.

The previous prime is 31222354354979. The next prime is 31222354355039. The reversal of 31222354354981 is 18945345322213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31137460209025 + 84894145956 = 5580095^2 + 291366^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222354354981 - 2¹ = 31222354354979 is a prime.

It is a super-2 number, since 2×31222354354981² (a number of 28 digits) contains 22 as substring.

Together with 31222354354979, 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 (31222354454981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611177177490 + 15611177177491.

It is an arithmetic number, because the mean of its divisors is an integer number (15611177177491).

Almost surely, 2^{31222354354981} is an apocalyptic number.

It is an amenable number.

31222354354981 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222354354981 is an equidigital number, since it uses as much as digits as its factorization.

31222354354981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 52.

The spelling of 31222354354981 in words is "thirty-one trillion, two hundred twenty-two billion, three hundred fifty-four million, three hundred fifty-four thousand, nine hundred eighty-one".