1312222001321 has 32 divisors (see below), whose sum is σ = 1725150873600. Its totient is φ = 966991236480.

The previous prime is 1312222001317. The next prime is 1312222001357. The reversal of 1312222001321 is 1231002222131.

It is a cyclic number.

It is not a de Polignac number, because 1312222001321 - 2² = 1312222001317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312222001293 and 1312222001302.

It is not an unprimeable number, because it can be changed into a prime (1312222001621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44276 + ... + 1620618.

It is an arithmetic number, because the mean of its divisors is an integer number (53910964800).

Almost surely, 2^{1312222001321} is an apocalyptic number.

1312222001321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312222001321 is a deficient number, since it is larger than the sum of its proper divisors (412928872279).

1312222001321 is a wasteful number, since it uses less digits than its factorization.

1312222001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576949.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1312222001321 its reverse (1231002222131), we get a palindrome (2543224223452).

The spelling of 1312222001321 in words is "one trillion, three hundred twelve billion, two hundred twenty-two million, one thousand, three hundred twenty-one".