1312221220363 has 2 divisors, whose sum is σ = 1312221220364. Its totient is φ = 1312221220362.

The previous prime is 1312221220357. The next prime is 1312221220399. The reversal of 1312221220363 is 3630221222131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312221220363 is a prime.

It is a super-2 number, since 2×1312221220363² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312221220463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656110610181 + 656110610182.

It is an arithmetic number, because the mean of its divisors is an integer number (656110610182).

Almost surely, 2^{1312221220363} is an apocalyptic number.

1312221220363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312221220363 is an equidigital number, since it uses as much as digits as its factorization.

1312221220363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1312221220363 its reverse (3630221222131), we get a palindrome (4942442442494).

The spelling of 1312221220363 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, three hundred sixty-three".