1303113221021 has 4 divisors (see below), whose sum is σ = 1303115594844. Its totient is φ = 1303110847200.

The previous prime is 1303113220979. The next prime is 1303113221029. The reversal of 1303113221021 is 1201223113031.

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 192747340900 + 1110365880121 = 439030^2 + 1053739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303113221021 - 2³⁸ = 1028235314077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303113220984 and 1303113221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303113221029) 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, 105911 + ... + 1617851.

It is an arithmetic number, because the mean of its divisors is an integer number (325778898711).

Almost surely, 2^{1303113221021} is an apocalyptic number.

It is an amenable number.

1303113221021 is a deficient number, since it is larger than the sum of its proper divisors (2373823).

1303113221021 is an equidigital number, since it uses as much as digits as its factorization.

1303113221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373822.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1303113221021 its reverse (1201223113031), we get a palindrome (2504336334052).

The spelling of 1303113221021 in words is "one trillion, three hundred three billion, one hundred thirteen million, two hundred twenty-one thousand, twenty-one".