1212131231312 has 40 divisors (see below), whose sum is σ = 2527416384552. Its totient is φ = 561063628800.

The previous prime is 1212131231303. The next prime is 1212131231321. The reversal of 1212131231312 is 2131321312121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212131231303) and next prime (1212131231321).

It can be written as a sum of positive squares in 4 ways, for example, as 390505009216 + 821626222096 = 624904^2 + 906436^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36510989 + ... + 36544172.

Almost surely, 2^{1212131231312} is an apocalyptic number.

It is an amenable number.

1212131231312 is an abundant number, since it is smaller than the sum of its proper divisors (1315285153240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212131231312 is a wasteful number, since it uses less digits than its factorization.

1212131231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73055247 (or 73055241 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

Adding to 1212131231312 its reverse (2131321312121), we get a palindrome (3343452543433).

The spelling of 1212131231312 in words is "one trillion, two hundred twelve billion, one hundred thirty-one million, two hundred thirty-one thousand, three hundred twelve".