1220344131 has 16 divisors (see below), whose sum is σ = 1668633120. Its totient is φ = 792852480.

The previous prime is 1220344117. The next prime is 1220344159. The reversal of 1220344131 is 1314430221.

It is not a de Polignac number, because 1220344131 - 2⁶ = 1220344067 is a prime.

It is a super-2 number, since 2×1220344131² = 2978479596132290322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220344098 and 1220344107.

It is not an unprimeable number, because it can be changed into a prime (1220344831) 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, 119191 + ... + 129023.

It is an arithmetic number, because the mean of its divisors is an integer number (104289570).

Almost surely, 2^1220344131 is an apocalyptic number.

1220344131 is a deficient number, since it is larger than the sum of its proper divisors (448288989).

1220344131 is a wasteful number, since it uses less digits than its factorization.

1220344131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1220344131 is about 34933.4242667392. The cubic root of 1220344131 is about 1068.6301890657.

Adding to 1220344131 its reverse (1314430221), we get a palindrome (2534774352).

The spelling of 1220344131 in words is "one billion, two hundred twenty million, three hundred forty-four thousand, one hundred thirty-one".