1010043021 has 16 divisors (see below), whose sum is σ = 1526651840. Its totient is φ = 588850560.

The previous prime is 1010042993. The next prime is 1010043061. The reversal of 1010043021 is 1203400101.

It is a happy number.

It is not a de Polignac number, because 1010043021 - 2⁷ = 1010042893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010042988 and 1010043006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010043061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680800 + ... + 682281.

It is an arithmetic number, because the mean of its divisors is an integer number (95415740).

Almost surely, 2^1010043021 is an apocalyptic number.

It is an amenable number.

1010043021 is a deficient number, since it is larger than the sum of its proper divisors (516608819).

1010043021 is a wasteful number, since it uses less digits than its factorization.

1010043021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363116.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1010043021 is about 31781.1740028590. The cubic root of 1010043021 is about 1003.3365288606.

Adding to 1010043021 its reverse (1203400101), we get a palindrome (2213443122).

The spelling of 1010043021 in words is "one billion, ten million, forty-three thousand, twenty-one".