1220032131 has 8 divisors (see below), whose sum is σ = 1630485504. Its totient is φ = 811466760.

The previous prime is 1220032127. The next prime is 1220032139. The reversal of 1220032131 is 1312300221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220032131 - 2² = 1220032127 is a prime.

It is a super-2 number, since 2×1220032131² = 2976956801344802322, 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 1220032131.

It is not an unprimeable number, because it can be changed into a prime (1220032139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470491 + ... + 473076.

It is an arithmetic number, because the mean of its divisors is an integer number (203810688).

Almost surely, 2^1220032131 is an apocalyptic number.

1220032131 is a deficient number, since it is larger than the sum of its proper divisors (410453373).

1220032131 is an equidigital number, since it uses as much as digits as its factorization.

1220032131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944001.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220032131 is about 34928.9583440446. The cubic root of 1220032131 is about 1068.5391106482.

Adding to 1220032131 its reverse (1312300221), we get a palindrome (2532332352).

The spelling of 1220032131 in words is "one billion, two hundred twenty million, thirty-two thousand, one hundred thirty-one".