31213222022233 has 2 divisors, whose sum is σ = 31213222022234. Its totient is φ = 31213222022232.

The previous prime is 31213222022189. The next prime is 31213222022261. The reversal of 31213222022233 is 33222022231213.

It is an a-pointer prime, because the next prime (31213222022261) can be obtained adding 31213222022233 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30564444934144 + 648777088089 = 5528512^2 + 805467^2 .

It is a cyclic number.

It is not a de Polignac number, because 31213222022233 - 2²⁹ = 31212685151321 is a prime.

It is a super-2 number, since 2×31213222022233² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31213222022933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606611011116 + 15606611011117.

It is an arithmetic number, because the mean of its divisors is an integer number (15606611011117).

Almost surely, 2^{31213222022233} is an apocalyptic number.

It is an amenable number.

31213222022233 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213222022233 is an equidigital number, since it uses as much as digits as its factorization.

31213222022233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31213222022233 its reverse (33222022231213), we get a palindrome (64435244253446).

The spelling of 31213222022233 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twenty-two million, twenty-two thousand, two hundred thirty-three".