31323222121044 has 24 divisors (see below), whose sum is σ = 83528592323008. Its totient is φ = 8949492034560.

The previous prime is 31323222121021. The next prime is 31323222121097. The reversal of 31323222121044 is 44012122232313.

It is a happy number.

It is a super-2 number, since 2×31323222121044² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186447750637 + ... + 186447750804.

Almost surely, 2^{31323222121044} is an apocalyptic number.

It is an amenable number.

31323222121044 is an abundant number, since it is smaller than the sum of its proper divisors (52205370201964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31323222121044 is a wasteful number, since it uses less digits than its factorization.

31323222121044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372895501455 (or 372895501453 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31323222121044 its reverse (44012122232313), we get a palindrome (75335344353357).

The spelling of 31323222121044 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred twenty-two million, one hundred twenty-one thousand, forty-four".