1220500131 has 16 divisors (see below), whose sum is σ = 1716973440. Its totient is φ = 769046400.

The previous prime is 1220500121. The next prime is 1220500189. The reversal of 1220500131 is 1310050221.

It is not a de Polignac number, because 1220500131 - 2¹⁰ = 1220499107 is a prime.

It is a super-2 number, since 2×1220500131² = 2979241139542034322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220500131.

It is not an unprimeable number, because it can be changed into a prime (1220500121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45 + ... + 49406.

It is an arithmetic number, because the mean of its divisors is an integer number (107310840).

Almost surely, 2^1220500131 is an apocalyptic number.

1220500131 is a deficient number, since it is larger than the sum of its proper divisors (496473309).

1220500131 is a wasteful number, since it uses less digits than its factorization.

1220500131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49906.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1220500131 is about 34935.6570140022. The cubic root of 1220500131 is about 1068.6757224532.

Adding to 1220500131 its reverse (1310050221), we get a palindrome (2530550352).

The spelling of 1220500131 in words is "one billion, two hundred twenty million, five hundred thousand, one hundred thirty-one".