1313442212021 has 4 divisors (see below), whose sum is σ = 1313457342252. Its totient is φ = 1313427081792.

The previous prime is 1313442211997. The next prime is 1313442212029. The reversal of 1313442212021 is 1202122443131.

It is a happy number.

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 71443409521 + 1241998802500 = 267289^2 + 1114450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313442212021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313442212029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7434146 + ... + 7608771.

It is an arithmetic number, because the mean of its divisors is an integer number (328364335563).

Almost surely, 2^{1313442212021} is an apocalyptic number.

It is an amenable number.

1313442212021 is a deficient number, since it is larger than the sum of its proper divisors (15130231).

1313442212021 is an equidigital number, since it uses as much as digits as its factorization.

1313442212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130230.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1313442212021 its reverse (1202122443131), we get a palindrome (2515564655152).

The spelling of 1313442212021 in words is "one trillion, three hundred thirteen billion, four hundred forty-two million, two hundred twelve thousand, twenty-one".