31130202212 has 6 divisors (see below), whose sum is σ = 54477853878. Its totient is φ = 15565101104.

The previous prime is 31130202211. The next prime is 31130202269. The reversal of 31130202212 is 21220203113.

It can be written as a sum of positive squares in only one way, i.e., 17211865636 + 13918336576 = 131194^2 + 117976^2 .

It is a super-3 number, since 3×31130202212³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31130202211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3891275273 + ... + 3891275280.

It is an arithmetic number, because the mean of its divisors is an integer number (9079642313).

Almost surely, 2^31130202212 is an apocalyptic number.

It is an amenable number.

31130202212 is a deficient number, since it is larger than the sum of its proper divisors (23347651666).

31130202212 is a wasteful number, since it uses less digits than its factorization.

31130202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782550557 (or 7782550555 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31130202212 its reverse (21220203113), we get a palindrome (52350405325).

Subtracting from 31130202212 its reverse (21220203113), we obtain a palindrome (9909999099).

The spelling of 31130202212 in words is "thirty-one billion, one hundred thirty million, two hundred two thousand, two hundred twelve".