31102211312 has 10 divisors (see below), whose sum is σ = 60260534448. Its totient is φ = 15551105648.

The previous prime is 31102211293. The next prime is 31102211317. The reversal of 31102211312 is 21311220113.

It is a super-2 number, since 2×31102211312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102211317) 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 as a sum of consecutive naturals, namely, 971944088 + ... + 971944119.

Almost surely, 2^31102211312 is an apocalyptic number.

It is an amenable number.

31102211312 is a deficient number, since it is larger than the sum of its proper divisors (29158323136).

31102211312 is a wasteful number, since it uses less digits than its factorization.

31102211312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943888215 (or 1943888209 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31102211312 its reverse (21311220113), we get a palindrome (52413431425).

The spelling of 31102211312 in words is "thirty-one billion, one hundred two million, two hundred eleven thousand, three hundred twelve".