1313122222021 has 2 divisors, whose sum is σ = 1313122222022. Its totient is φ = 1313122222020.

The previous prime is 1313122221997. The next prime is 1313122222039. The reversal of 1313122222021 is 1202222213131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263353520100 + 49768701921 = 1123990^2 + 223089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313122222021 - 2⁵ = 1313122221989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313122221983 and 1313122222001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313122222051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656561111010 + 656561111011.

It is an arithmetic number, because the mean of its divisors is an integer number (656561111011).

Almost surely, 2^{1313122222021} is an apocalyptic number.

It is an amenable number.

1313122222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313122222021 is an equidigital number, since it uses as much as digits as its factorization.

1313122222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1313122222021 its reverse (1202222213131), we get a palindrome (2515344435152).

The spelling of 1313122222021 in words is "one trillion, three hundred thirteen billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".