31001221323 has 12 divisors (see below), whose sum is σ = 45513633568. Its totient is φ = 20328669360.

The previous prime is 31001221211. The next prime is 31001221333. The reversal of 31001221323 is 32312210013.

31001221323 is a `hidden beast` number, since 310 + 0 + 12 + 21 + 323 = 666.

It is not a de Polignac number, because 31001221323 - 2³⁰ = 29927479499 is a prime.

It is a super-2 number, since 2×31001221323² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31001221296 and 31001221305.

It is not an unprimeable number, because it can be changed into a prime (31001221333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28233715 + ... + 28234812.

Almost surely, 2^31001221323 is an apocalyptic number.

31001221323 is a deficient number, since it is larger than the sum of its proper divisors (14512412245).

31001221323 is a wasteful number, since it uses less digits than its factorization.

31001221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56468594 (or 56468591 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31001221323 its reverse (32312210013), we get a palindrome (63313431336).

The spelling of 31001221323 in words is "thirty-one billion, one million, two hundred twenty-one thousand, three hundred twenty-three".