1220210113 has 4 divisors (see below), whose sum is σ = 1220482900. Its totient is φ = 1219937328.

The previous prime is 1220210107. The next prime is 1220210129. The reversal of 1220210113 is 3110120221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3110120221 = 13 ⋅239240017.

It can be written as a sum of positive squares in 2 ways, for example, as 804743424 + 415466689 = 28368^2 + 20383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220210113 - 2¹⁷ = 1220079041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220210093 and 1220210102.

It is not an unprimeable number, because it can be changed into a prime (1220210413) 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, 129570 + ... + 138667.

It is an arithmetic number, because the mean of its divisors is an integer number (305120725).

Almost surely, 2^1220210113 is an apocalyptic number.

It is an amenable number.

1220210113 is a deficient number, since it is larger than the sum of its proper divisors (272787).

1220210113 is an equidigital number, since it uses as much as digits as its factorization.

1220210113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272786.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1220210113 is about 34931.5060225007. The cubic root of 1220210113 is about 1068.5910687007.

Adding to 1220210113 its reverse (3110120221), we get a palindrome (4330330334).

The spelling of 1220210113 in words is "one billion, two hundred twenty million, two hundred ten thousand, one hundred thirteen".