31123222130322 has 72 divisors (see below), whose sum is σ = 81148161919500. Its totient is φ = 8585716442688.

The previous prime is 31123222130321. The next prime is 31123222130479. The reversal of 31123222130322 is 22303122232113.

31123222130322 is a `hidden beast` number, since 3 + 1 + 1 + 2 + 322 + 2 + 13 + 0 + 322 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31116884219001 + 6337911321 = 5578251^2 + 79611^2 .

It is not an unprimeable number, because it can be changed into a prime (31123222130321) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 608372697 + ... + 608423852.

Almost surely, 2^{31123222130322} is an apocalyptic number.

31123222130322 is an abundant number, since it is smaller than the sum of its proper divisors (50024939789178).

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

31123222130322 is a wasteful number, since it uses less digits than its factorization.

31123222130322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216796600 (or 1216796590 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31123222130322 its reverse (22303122232113), we get a palindrome (53426344362435).

The spelling of 31123222130322 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred twenty-two million, one hundred thirty thousand, three hundred twenty-two".