21233222002 has 4 divisors (see below), whose sum is σ = 31849833006. Its totient is φ = 10616611000.

The previous prime is 21233221991. The next prime is 21233222009. The reversal of 21233222002 is 20022233212.

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., 20643655041 + 589566961 = 143679^2 + 24281^2 .

It is not an unprimeable number, because it can be changed into a prime (21233222009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5308305499 + ... + 5308305502.

Almost surely, 2^21233222002 is an apocalyptic number.

21233222002 is a deficient number, since it is larger than the sum of its proper divisors (10616611004).

21233222002 is a wasteful number, since it uses less digits than its factorization.

21233222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616611003.

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

Adding to 21233222002 its reverse (20022233212), we get a palindrome (41255455214).

The spelling of 21233222002 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty-two thousand, two".