1220100313 has 4 divisors (see below), whose sum is σ = 1220358628. Its totient is φ = 1219842000.

The previous prime is 1220100311. The next prime is 1220100331. The reversal of 1220100313 is 3130010221.

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 1067132889 + 152967424 = 32667^2 + 12368^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220100313 - 2¹ = 1220100311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220100293 and 1220100302.

It is not an unprimeable number, because it can be changed into a prime (1220100311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121938 + ... + 131563.

It is an arithmetic number, because the mean of its divisors is an integer number (305089657).

Almost surely, 2^1220100313 is an apocalyptic number.

It is an amenable number.

1220100313 is a deficient number, since it is larger than the sum of its proper divisors (258315).

1220100313 is an equidigital number, since it uses as much as digits as its factorization.

1220100313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258314.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1220100313 is about 34929.9343400471. The cubic root of 1220100313 is about 1068.5590155273.

Adding to 1220100313 its reverse (3130010221), we get a palindrome (4350110534).

The spelling of 1220100313 in words is "one billion, two hundred twenty million, one hundred thousand, three hundred thirteen".