21220433002 has 4 divisors (see below), whose sum is σ = 31830649506. Its totient is φ = 10610216500.

The previous prime is 21220432907. The next prime is 21220433023. The reversal of 21220433002 is 20033402212.

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

It can be written as a sum of positive squares in only one way, i.e., 12593552841 + 8626880161 = 112221^2 + 92881^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5305108249 + ... + 5305108252.

Almost surely, 2^21220433002 is an apocalyptic number.

21220433002 is a deficient number, since it is larger than the sum of its proper divisors (10610216504).

21220433002 is a wasteful number, since it uses less digits than its factorization.

21220433002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610216503.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21220433002 its reverse (20033402212), we get a palindrome (41253835214).

The spelling of 21220433002 in words is "twenty-one billion, two hundred twenty million, four hundred thirty-three thousand, two".