1001220131 has 2 divisors, whose sum is σ = 1001220132. Its totient is φ = 1001220130.

The previous prime is 1001220097. The next prime is 1001220133. The reversal of 1001220131 is 1310221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001220131 - 2²⁶ = 934111267 is a prime.

It is a super-2 number, since 2×1001220131² = 2004883501439314322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1001220133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1001220133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610065 + 500610066.

It is an arithmetic number, because the mean of its divisors is an integer number (500610066).

Almost surely, 2^1001220131 is an apocalyptic number.

1001220131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220131 is an equidigital number, since it uses as much as digits as its factorization.

1001220131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1001220131 is about 31642.0626856089. The cubic root of 1001220131 is about 1000.4065450321.

Adding to 1001220131 its reverse (1310221001), we get a palindrome (2311441132).

The spelling of 1001220131 in words is "one billion, one million, two hundred twenty thousand, one hundred thirty-one".