1220220113 has 16 divisors (see below), whose sum is σ = 1427207040. Its totient is φ = 1021577856.

The previous prime is 1220220083. The next prime is 1220220137. The reversal of 1220220113 is 3110220221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1220220113 - 2⁶ = 1220220049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220220193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76973 + ... + 91461.

It is an arithmetic number, because the mean of its divisors is an integer number (89200440).

Almost surely, 2^1220220113 is an apocalyptic number.

It is an amenable number.

1220220113 is a deficient number, since it is larger than the sum of its proper divisors (206986927).

1220220113 is a wasteful number, since it uses less digits than its factorization.

1220220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14776.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1220220113 is about 34931.6491594657. The cubic root of 1220220113 is about 1068.5939878377.

Adding to 1220220113 its reverse (3110220221), we get a palindrome (4330440334).

The spelling of 1220220113 in words is "one billion, two hundred twenty million, two hundred twenty thousand, one hundred thirteen".