1220220013 has 4 divisors (see below), whose sum is σ = 1238432320. Its totient is φ = 1202007708.

The previous prime is 1220219971. The next prime is 1220220019. The reversal of 1220220013 is 3100220221.

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 a cyclic number.

It is not a de Polignac number, because 1220220013 - 2¹⁷ = 1220088941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220219975 and 1220220002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220220019) 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, 9106053 + ... + 9106186.

It is an arithmetic number, because the mean of its divisors is an integer number (309608080).

Almost surely, 2^1220220013 is an apocalyptic number.

It is an amenable number.

1220220013 is a deficient number, since it is larger than the sum of its proper divisors (18212307).

1220220013 is an equidigital number, since it uses as much as digits as its factorization.

1220220013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18212306.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1220220013 is about 34931.6477280989. The cubic root of 1220220013 is about 1068.5939586464.

Adding to 1220220013 its reverse (3100220221), we get a palindrome (4320440234).

The spelling of 1220220013 in words is "one billion, two hundred twenty million, two hundred twenty thousand, thirteen".