1220131031 has 8 divisors (see below), whose sum is σ = 1395572640. Its totient is φ = 1044973728.

The previous prime is 1220131027. The next prime is 1220131039. The reversal of 1220131031 is 1301310221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220131031 - 2² = 1220131027 is a prime.

It is a super-2 number, since 2×1220131031² = 2977439465618245922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220130997 and 1220131015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220131039) 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 7 ways as a sum of consecutive naturals, for example, 61796 + ... + 79113.

It is an arithmetic number, because the mean of its divisors is an integer number (174446580).

Almost surely, 2^1220131031 is an apocalyptic number.

1220131031 is a deficient number, since it is larger than the sum of its proper divisors (175441609).

1220131031 is a wasteful number, since it uses less digits than its factorization.

1220131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142153.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1220131031 is about 34930.3740460935. The cubic root of 1220131031 is about 1068.5679830196.

Adding to 1220131031 its reverse (1301310221), we get a palindrome (2521441252).

The spelling of 1220131031 in words is "one billion, two hundred twenty million, one hundred thirty-one thousand, thirty-one".