21230333002 has 4 divisors (see below), whose sum is σ = 31845499506. Its totient is φ = 10615166500.

The previous prime is 21230332987. The next prime is 21230333039. The reversal of 21230333002 is 20033303212.

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 only one way, i.e., 14957534601 + 6272798401 = 122301^2 + 79201^2 .

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, 5307583249 + ... + 5307583252.

Almost surely, 2^21230333002 is an apocalyptic number.

21230333002 is a deficient number, since it is larger than the sum of its proper divisors (10615166504).

21230333002 is a wasteful number, since it uses less digits than its factorization.

21230333002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615166503.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21230333002 its reverse (20033303212), we get a palindrome (41263636214).

The spelling of 21230333002 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-three thousand, two".