31000130210212 has 6 divisors (see below), whose sum is σ = 54250227867878. Its totient is φ = 15500065105104.

The previous prime is 31000130210209. The next prime is 31000130210219. The reversal of 31000130210212 is 21201203100013.

It can be written as a sum of positive squares in only one way, i.e., 30995786872996 + 4343337216 = 5567386^2 + 65904^2 .

It is a super-2 number, since 2×31000130210212² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31000130210219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3875016276273 + ... + 3875016276280.

Almost surely, 2^{31000130210212} is an apocalyptic number.

It is an amenable number.

31000130210212 is a deficient number, since it is larger than the sum of its proper divisors (23250097657666).

31000130210212 is a wasteful number, since it uses less digits than its factorization.

31000130210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750032552557 (or 7750032552555 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31000130210212 its reverse (21201203100013), we get a palindrome (52201333310225).

The spelling of 31000130210212 in words is "thirty-one trillion, one hundred thirty million, two hundred ten thousand, two hundred twelve".