1312223123212 has 24 divisors (see below), whose sum is σ = 2309521294080. Its totient is φ = 652363194240.

The previous prime is 1312223123203. The next prime is 1312223123231. The reversal of 1312223123212 is 2123213222131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184898 + ... + 2007094.

It is an arithmetic number, because the mean of its divisors is an integer number (96230053920).

Almost surely, 2^{1312223123212} is an apocalyptic number.

It is an amenable number.

1312223123212 is a deficient number, since it is larger than the sum of its proper divisors (997298170868).

1312223123212 is a wasteful number, since it uses less digits than its factorization.

1312223123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824481 (or 824479 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 1312223123212 its reverse (2123213222131), we get a palindrome (3435436345343).

The spelling of 1312223123212 in words is "one trillion, three hundred twelve billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred twelve".