1002021223 has 4 divisors (see below), whose sum is σ = 1145167120. Its totient is φ = 858875328.

The previous prime is 1002021179. The next prime is 1002021239. The reversal of 1002021223 is 3221202001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221202001 = 6949 ⋅463549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002021223 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 (1002021283) 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, 71572938 + ... + 71572951.

It is an arithmetic number, because the mean of its divisors is an integer number (286291780).

Almost surely, 2^1002021223 is an apocalyptic number.

1002021223 is a deficient number, since it is larger than the sum of its proper divisors (143145897).

1002021223 is an equidigital number, since it uses as much as digits as its factorization.

1002021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143145896.

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

The square root of 1002021223 is about 31654.7188109451. The cubic root of 1002021223 is about 1000.6732875821.

Adding to 1002021223 its reverse (3221202001), we get a palindrome (4223223224).

The spelling of 1002021223 in words is "one billion, two million, twenty-one thousand, two hundred twenty-three".