1313322223021 has 4 divisors (see below), whose sum is σ = 1390576471452. Its totient is φ = 1236067974592.

The previous prime is 1313322223019. The next prime is 1313322223051. The reversal of 1313322223021 is 1203222233131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 534048177796 + 779274045225 = 730786^2 + 882765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313322223021 - 2¹ = 1313322223019 is a prime.

It is a super-2 number, since 2×1313322223021² (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 (1313322223001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38627124190 + ... + 38627124223.

It is an arithmetic number, because the mean of its divisors is an integer number (347644117863).

Almost surely, 2^{1313322223021} is an apocalyptic number.

It is an amenable number.

1313322223021 is a deficient number, since it is larger than the sum of its proper divisors (77254248431).

1313322223021 is an equidigital number, since it uses as much as digits as its factorization.

1313322223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77254248430.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1313322223021 its reverse (1203222233131), we get a palindrome (2516544456152).

The spelling of 1313322223021 in words is "one trillion, three hundred thirteen billion, three hundred twenty-two million, two hundred twenty-three thousand, twenty-one".