1321230313212 has 24 divisors (see below), whose sum is σ = 3082891120512. Its totient is φ = 440407191600.

The previous prime is 1321230313199. The next prime is 1321230313307. The reversal of 1321230313212 is 2123130321231.

It is a congruent number.

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, 2313537 + ... + 2827527.

It is an arithmetic number, because the mean of its divisors is an integer number (128453796688).

Almost surely, 2^{1321230313212} is an apocalyptic number.

1321230313212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321230313212 is an abundant number, since it is smaller than the sum of its proper divisors (1761660807300).

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

1321230313212 is a wasteful number, since it uses less digits than its factorization.

1321230313212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728209 (or 728207 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1321230313212 its reverse (2123130321231), we get a palindrome (3444360634443).

The spelling of 1321230313212 in words is "one trillion, three hundred twenty-one billion, two hundred thirty million, three hundred thirteen thousand, two hundred twelve".