1010023021 has 4 divisors (see below), whose sum is σ = 1154312032. Its totient is φ = 865734012.

The previous prime is 1010023013. The next prime is 1010023031. The reversal of 1010023021 is 1203200101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1010023021 - 2³ = 1010023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010022989 and 1010023007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010023031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72144495 + ... + 72144508.

It is an arithmetic number, because the mean of its divisors is an integer number (288578008).

Almost surely, 2^1010023021 is an apocalyptic number.

It is an amenable number.

1010023021 is a deficient number, since it is larger than the sum of its proper divisors (144289011).

1010023021 is an equidigital number, since it uses as much as digits as its factorization.

1010023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144289010.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1010023021 is about 31780.8593496148. The cubic root of 1010023021 is about 1003.3299064156.

Adding to 1010023021 its reverse (1203200101), we get a palindrome (2213223122).

The spelling of 1010023021 in words is "one billion, ten million, twenty-three thousand, twenty-one".