31012230212 has 12 divisors (see below), whose sum is σ = 57463838460. Its totient is φ = 14593990656.

The previous prime is 31012230211. The next prime is 31012230233. The reversal of 31012230212 is 21203221013.

It can be written as a sum of positive squares in 2 ways, for example, as 9733006336 + 21279223876 = 98656^2 + 145874^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (31012230211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228031037 + ... + 228031172.

It is an arithmetic number, because the mean of its divisors is an integer number (4788653205).

Almost surely, 2^31012230212 is an apocalyptic number.

It is an amenable number.

31012230212 is a deficient number, since it is larger than the sum of its proper divisors (26451608248).

31012230212 is a wasteful number, since it uses less digits than its factorization.

31012230212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456062230 (or 456062228 counting only the distinct ones).

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

Adding to 31012230212 its reverse (21203221013), we get a palindrome (52215451225).

The spelling of 31012230212 in words is "thirty-one billion, twelve million, two hundred thirty thousand, two hundred twelve".