31223013221333 has 16 divisors (see below), whose sum is σ = 34497892711296. Its totient is φ = 28108000588800.

The previous prime is 31223013221303. The next prime is 31223013221359. The reversal of 31223013221333 is 33312231032213.

It is a cyclic number.

It is not a de Polignac number, because 31223013221333 - 2¹⁸ = 31223012959189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31223013221296 and 31223013221305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223013221303) 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, 15140510 + ... + 17078672.

It is an arithmetic number, because the mean of its divisors is an integer number (2156118294456).

Almost surely, 2^{31223013221333} is an apocalyptic number.

It is an amenable number.

31223013221333 is a deficient number, since it is larger than the sum of its proper divisors (3274879489963).

31223013221333 is a wasteful number, since it uses less digits than its factorization.

31223013221333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979404.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 31223013221333 its reverse (33312231032213), we get a palindrome (64535244253546).

The spelling of 31223013221333 in words is "thirty-one trillion, two hundred twenty-three billion, thirteen million, two hundred twenty-one thousand, three hundred thirty-three".