1312011332221 has 8 divisors (see below), whose sum is σ = 1343127789344. Its totient is φ = 1280922355440.

The previous prime is 1312011332153. The next prime is 1312011332227. The reversal of 1312011332221 is 1222331102131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312011332221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312011332192 and 1312011332201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312011332227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6773451 + ... + 6964456.

It is an arithmetic number, because the mean of its divisors is an integer number (167890973668).

Almost surely, 2^{1312011332221} is an apocalyptic number.

It is an amenable number.

1312011332221 is a deficient number, since it is larger than the sum of its proper divisors (31116457123).

1312011332221 is a wasteful number, since it uses less digits than its factorization.

1312011332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13740171.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1312011332221 its reverse (1222331102131), we get a palindrome (2534342434352).

The spelling of 1312011332221 in words is "one trillion, three hundred twelve billion, eleven million, three hundred thirty-two thousand, two hundred twenty-one".