1033221421 has 4 divisors (see below), whose sum is σ = 1033753500. Its totient is φ = 1032689344.

The previous prime is 1033221401. The next prime is 1033221437. The reversal of 1033221421 is 1241223301.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 952401321 + 80820100 = 30861^2 + 8990^2 .

It is not a de Polignac number, because 1033221421 - 2¹⁷ = 1033090349 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 (1033221401) 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, 263116 + ... + 267013.

It is an arithmetic number, because the mean of its divisors is an integer number (258438375).

Almost surely, 2^1033221421 is an apocalyptic number.

It is an amenable number.

1033221421 is a deficient number, since it is larger than the sum of its proper divisors (532079).

1033221421 is an equidigital number, since it uses as much as digits as its factorization.

1033221421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532078.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1033221421 is about 32143.7617742541. The cubic root of 1033221421 is about 1010.9533921494.

Adding to 1033221421 its reverse (1241223301), we get a palindrome (2274444722).

The spelling of 1033221421 in words is "one billion, thirty-three million, two hundred twenty-one thousand, four hundred twenty-one".