1331321221212 has 48 divisors (see below), whose sum is σ = 3122876198400. Its totient is φ = 441423525312.

The previous prime is 1331321221201. The next prime is 1331321221247. The reversal of 1331321221212 is 2121221231331.

It is a super-2 number, since 2×1331321221212² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8921598 + ... + 9069594.

It is an arithmetic number, because the mean of its divisors is an integer number (65059920800).

Almost surely, 2^{1331321221212} is an apocalyptic number.

1331321221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1331321221212 is an abundant number, since it is smaller than the sum of its proper divisors (1791554977188).

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

1331321221212 is a wasteful number, since it uses less digits than its factorization.

1331321221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151970 (or 151968 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 1331321221212 its reverse (2121221231331), we get a palindrome (3452542452543).

The spelling of 1331321221212 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".