21230023202 has 8 divisors (see below), whose sum is σ = 31845678876. Its totient is φ = 10614796912.

The previous prime is 21230023189. The next prime is 21230023237. The reversal of 21230023202 is 20232003212.

It can be written as a sum of positive squares in 2 ways, for example, as 19858728241 + 1371294961 = 140921^2 + 37031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85688 + ... + 223164.

Almost surely, 2^21230023202 is an apocalyptic number.

21230023202 is a deficient number, since it is larger than the sum of its proper divisors (10615655674).

21230023202 is a wasteful number, since it uses less digits than its factorization.

21230023202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214692.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 21230023202 its reverse (20232003212), we get a palindrome (41462026414).

The spelling of 21230023202 in words is "twenty-one billion, two hundred thirty million, twenty-three thousand, two hundred two".