31212120120212 has 12 divisors (see below), whose sum is σ = 55051298480640. Its totient is φ = 15483177697176.

The previous prime is 31212120120193. The next prime is 31212120120221. The reversal of 31212120120212 is 21202102121213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30720590162 + ... + 30720591177.

It is an arithmetic number, because the mean of its divisors is an integer number (4587608206720).

Almost surely, 2^{31212120120212} is an apocalyptic number.

It is an amenable number.

31212120120212 is a deficient number, since it is larger than the sum of its proper divisors (23839178360428).

31212120120212 is a wasteful number, since it uses less digits than its factorization.

31212120120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61441181470 (or 61441181468 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 31212120120212 its reverse (21202102121213), we get a palindrome (52414222241425).

The spelling of 31212120120212 in words is "thirty-one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty thousand, two hundred twelve".