1021000223 has 4 divisors (see below), whose sum is σ = 1042723680. Its totient is φ = 999276768.

The previous prime is 1021000219. The next prime is 1021000231. The reversal of 1021000223 is 3220001201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021000223 - 2² = 1021000219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021000423) 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, 10861658 + ... + 10861751.

It is an arithmetic number, because the mean of its divisors is an integer number (260680920).

Almost surely, 2^1021000223 is an apocalyptic number.

1021000223 is a deficient number, since it is larger than the sum of its proper divisors (21723457).

1021000223 is an equidigital number, since it uses as much as digits as its factorization.

1021000223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21723456.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1021000223 is about 31953.0941068310. The cubic root of 1021000223 is about 1006.9516370951.

Adding to 1021000223 its reverse (3220001201), we get a palindrome (4241001424).

The spelling of 1021000223 in words is "one billion, twenty-one million, two hundred twenty-three", and thus it is an aban number.