1021040431 has 2 divisors, whose sum is σ = 1021040432. Its totient is φ = 1021040430.

The previous prime is 1021040399. The next prime is 1021040437. The reversal of 1021040431 is 1340401201.

It is a strong prime.

It is an emirp because it is prime and its reverse (1340401201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021040431 - 2⁵ = 1021040399 is a prime.

It is a super-2 number, since 2×1021040431² = 2085047123473331522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021040437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510520215 + 510520216.

It is an arithmetic number, because the mean of its divisors is an integer number (510520216).

Almost surely, 2^1021040431 is an apocalyptic number.

1021040431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021040431 is an equidigital number, since it uses as much as digits as its factorization.

1021040431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1021040431 is about 31953.7232728832. The cubic root of 1021040431 is about 1006.9648551726.

Adding to 1021040431 its reverse (1340401201), we get a palindrome (2361441632).

The spelling of 1021040431 in words is "one billion, twenty-one million, forty thousand, four hundred thirty-one".