1020013231 has 2 divisors, whose sum is σ = 1020013232. Its totient is φ = 1020013230.

The previous prime is 1020013229. The next prime is 1020013261. The reversal of 1020013231 is 1323100201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020013231 - 2¹ = 1020013229 is a prime.

It is a super-2 number, since 2×1020013231² = 2080853982830118722, which contains 22 as substring.

Together with 1020013229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020013261) 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 as a sum of consecutive naturals, namely, 510006615 + 510006616.

It is an arithmetic number, because the mean of its divisors is an integer number (510006616).

Almost surely, 2^1020013231 is an apocalyptic number.

1020013231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020013231 is an equidigital number, since it uses as much as digits as its factorization.

1020013231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1020013231 is about 31937.6459840108. The cubic root of 1020013231 is about 1006.6270620331.

Adding to 1020013231 its reverse (1323100201), we get a palindrome (2343113432).

The spelling of 1020013231 in words is "one billion, twenty million, thirteen thousand, two hundred thirty-one".