31313211130312 has 8 divisors (see below), whose sum is σ = 58712270869350. Its totient is φ = 15656605565152.

The previous prime is 31313211130273. The next prime is 31313211130321. The reversal of 31313211130312 is 21303111231313.

It can be written as a sum of positive squares in only one way, i.e., 28785092050276 + 2528119080036 = 5365174^2 + 1590006^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×31313211130312³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957075695637 + ... + 1957075695652.

Almost surely, 2^{31313211130312} is an apocalyptic number.

It is an amenable number.

31313211130312 is a deficient number, since it is larger than the sum of its proper divisors (27399059739038).

31313211130312 is a wasteful number, since it uses less digits than its factorization.

31313211130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914151391295 (or 3914151391291 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31313211130312 its reverse (21303111231313), we get a palindrome (52616322361625).

The spelling of 31313211130312 in words is "thirty-one trillion, three hundred thirteen billion, two hundred eleven million, one hundred thirty thousand, three hundred twelve".