31123022217113 has 2 divisors, whose sum is σ = 31123022217114. Its totient is φ = 31123022217112.

The previous prime is 31123022217097. The next prime is 31123022217163. The reversal of 31123022217113 is 31171222032113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16813960833289 + 14309061383824 = 4100483^2 + 3782732^2 .

It is an emirp because it is prime and its reverse (31171222032113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31123022217113 - 2⁴ = 31123022217097 is a prime.

It is a super-2 number, since 2×31123022217113² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31123022217163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561511108556 + 15561511108557.

It is an arithmetic number, because the mean of its divisors is an integer number (15561511108557).

Almost surely, 2^{31123022217113} is an apocalyptic number.

It is an amenable number.

31123022217113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123022217113 is an equidigital number, since it uses as much as digits as its factorization.

31123022217113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 31123022217113 its reverse (31171222032113), we get a palindrome (62294244249226).

The spelling of 31123022217113 in words is "thirty-one trillion, one hundred twenty-three billion, twenty-two million, two hundred seventeen thousand, one hundred thirteen".