1023002221 has 4 divisors (see below), whose sum is σ = 1032055452. Its totient is φ = 1013948992.

The previous prime is 1023002203. The next prime is 1023002249. The reversal of 1023002221 is 1222003201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222003201 = 829 ⋅1474069.

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 1013148900 = 3139^2 + 31830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023002221 - 2¹⁷ = 1022871149 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 (1023002021) 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, 4526446 + ... + 4526671.

It is an arithmetic number, because the mean of its divisors is an integer number (258013863).

Almost surely, 2^1023002221 is an apocalyptic number.

It is an amenable number.

1023002221 is a deficient number, since it is larger than the sum of its proper divisors (9053231).

1023002221 is an equidigital number, since it uses as much as digits as its factorization.

1023002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9053230.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1023002221 is about 31984.4059035024. The cubic root of 1023002221 is about 1007.6093578073.

Adding to 1023002221 its reverse (1222003201), we get a palindrome (2245005422).

The spelling of 1023002221 in words is "one billion, twenty-three million, two thousand, two hundred twenty-one".