31212101212 has 12 divisors (see below), whose sum is σ = 54627304480. Its totient is φ = 15604299936.

The previous prime is 31212101203. The next prime is 31212101213. The reversal of 31212101212 is 21210121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212101213) 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, 397137 + ... + 469192.

Almost surely, 2^31212101212 is an apocalyptic number.

It is an amenable number.

31212101212 is a deficient number, since it is larger than the sum of its proper divisors (23415203268).

31212101212 is a wasteful number, since it uses less digits than its factorization.

31212101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875340 (or 875338 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31212101212 its reverse (21210121213), we get a palindrome (52422222425).

The spelling of 31212101212 in words is "thirty-one billion, two hundred twelve million, one hundred one thousand, two hundred twelve".