31223323212133 has 16 divisors (see below), whose sum is σ = 34407561850816. Its totient is φ = 28150880486400.

The previous prime is 31223323212127. The next prime is 31223323212143. The reversal of 31223323212133 is 33121232332213.

It is a cyclic number.

It is not a de Polignac number, because 31223323212133 - 2¹⁷ = 31223323081061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31223323212095 and 31223323212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223323212143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46137658 + ... + 46809508.

It is an arithmetic number, because the mean of its divisors is an integer number (2150472615676).

Almost surely, 2^{31223323212133} is an apocalyptic number.

It is an amenable number.

31223323212133 is a deficient number, since it is larger than the sum of its proper divisors (3184238638683).

31223323212133 is a wasteful number, since it uses less digits than its factorization.

31223323212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755044.

The product of its digits is 23328, while the sum is 31.

Adding to 31223323212133 its reverse (33121232332213), we get a palindrome (64344555544346).

The spelling of 31223323212133 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred twenty-three million, two hundred twelve thousand, one hundred thirty-three".