1202423221 has 4 divisors (see below), whose sum is σ = 1202520352. Its totient is φ = 1202326092.

The previous prime is 1202423207. The next prime is 1202423237. The reversal of 1202423221 is 1223242021.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1202423221 - 2¹³ = 1202415029 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 (1202423251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26721 + ... + 55846.

It is an arithmetic number, because the mean of its divisors is an integer number (300630088).

Almost surely, 2^1202423221 is an apocalyptic number.

It is an amenable number.

1202423221 is a deficient number, since it is larger than the sum of its proper divisors (97131).

1202423221 is an equidigital number, since it uses as much as digits as its factorization.

1202423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97130.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1202423221 is about 34675.9746943038. The cubic root of 1202423221 is about 1063.3733817349.

Adding to 1202423221 its reverse (1223242021), we get a palindrome (2425665242).

It can be divided in two parts, 12024 and 23221, that added together give a triangular number (35245 = T₂₆₅).

The spelling of 1202423221 in words is "one billion, two hundred two million, four hundred twenty-three thousand, two hundred twenty-one".