1021234431 has 48 divisors (see below), whose sum is σ = 1661299200. Its totient is φ = 555331392.

The previous prime is 1021234349. The next prime is 1021234441. The reversal of 1021234431 is 1344321201.

It is not a de Polignac number, because 1021234431 - 2⁹ = 1021233919 is a prime.

It is a super-2 number, since 2×1021234431² = 2085839526119787522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1021234398 and 1021234407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021234441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 773590 + ... + 774908.

It is an arithmetic number, because the mean of its divisors is an integer number (34610400).

Almost surely, 2^1021234431 is an apocalyptic number.

1021234431 is a deficient number, since it is larger than the sum of its proper divisors (640064769).

1021234431 is a wasteful number, since it uses less digits than its factorization.

1021234431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1581 counting only the distinct ones).

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

The square root of 1021234431 is about 31956.7587686862. The cubic root of 1021234431 is about 1007.0286263367.

Adding to 1021234431 its reverse (1344321201), we get a palindrome (2365555632).

The spelling of 1021234431 in words is "one billion, twenty-one million, two hundred thirty-four thousand, four hundred thirty-one".