1312232223221 has 8 divisors (see below), whose sum is σ = 1375499235264. Its totient is φ = 1250453846880.

The previous prime is 1312232223217. The next prime is 1312232223301. The reversal of 1312232223221 is 1223222322131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312232223221 - 2² = 1312232223217 is a prime.

It is a super-2 number, since 2×1312232223221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312232243221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372157121 + ... + 372160646.

It is an arithmetic number, because the mean of its divisors is an integer number (171937404408).

Almost surely, 2^{1312232223221} is an apocalyptic number.

It is an amenable number.

1312232223221 is a deficient number, since it is larger than the sum of its proper divisors (63267012043).

1312232223221 is an equidigital number, since it uses as much as digits as its factorization.

1312232223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744317851.

The product of its digits is 3456, while the sum is 26.

Adding to 1312232223221 its reverse (1223222322131), we get a palindrome (2535454545352).

The spelling of 1312232223221 in words is "one trillion, three hundred twelve billion, two hundred thirty-two million, two hundred twenty-three thousand, two hundred twenty-one".