1031220203313 has 4 divisors (see below), whose sum is σ = 1374960271088. Its totient is φ = 687480135540.

The previous prime is 1031220203309. The next prime is 1031220203339. The reversal of 1031220203313 is 3133020221301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1031220203313 - 2² = 1031220203309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031220203313.

It is not an unprimeable number, because it can be changed into a prime (1031220203383) 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, 171870033883 + ... + 171870033888.

It is an arithmetic number, because the mean of its divisors is an integer number (343740067772).

Almost surely, 2^{1031220203313} is an apocalyptic number.

It is an amenable number.

1031220203313 is a deficient number, since it is larger than the sum of its proper divisors (343740067775).

1031220203313 is an equidigital number, since it uses as much as digits as its factorization.

1031220203313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343740067774.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1031220203313 its reverse (3133020221301), we get a palindrome (4164240424614).

The spelling of 1031220203313 in words is "one trillion, thirty-one billion, two hundred twenty million, two hundred three thousand, three hundred thirteen".