1021434231 has 4 divisors (see below), whose sum is σ = 1361912312. Its totient is φ = 680956152.

The previous prime is 1021434199. The next prime is 1021434251. The reversal of 1021434231 is 1324341201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1324341201 = 3 ⋅441447067.

It is not a de Polignac number, because 1021434231 - 2⁵ = 1021434199 is a prime.

It is a super-2 number, since 2×1021434231² = 2086655776517122722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021434198 and 1021434207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021434251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170239036 + ... + 170239041.

It is an arithmetic number, because the mean of its divisors is an integer number (340478078).

Almost surely, 2^1021434231 is an apocalyptic number.

1021434231 is a deficient number, since it is larger than the sum of its proper divisors (340478081).

1021434231 is an equidigital number, since it uses as much as digits as its factorization.

1021434231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340478080.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1021434231 is about 31959.8847150612. The cubic root of 1021434231 is about 1007.0942956200.

Adding to 1021434231 its reverse (1324341201), we get a palindrome (2345775432).

The spelling of 1021434231 in words is "one billion, twenty-one million, four hundred thirty-four thousand, two hundred thirty-one".