21230032210 has 8 divisors (see below), whose sum is σ = 38214057996. Its totient is φ = 8492012880.

The previous prime is 21230032189. The next prime is 21230032237. The reversal of 21230032210 is 1223003212.

It can be written as a sum of positive squares in 2 ways, for example, as 19908927801 + 1321104409 = 141099^2 + 36347^2 .

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, 1061501601 + ... + 1061501620.

Almost surely, 2^21230032210 is an apocalyptic number.

21230032210 is a deficient number, since it is larger than the sum of its proper divisors (16984025786).

21230032210 is a wasteful number, since it uses less digits than its factorization.

21230032210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123003228.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21230032210 its reverse (1223003212), we get a palindrome (22453035422).

The spelling of 21230032210 in words is "twenty-one billion, two hundred thirty million, thirty-two thousand, two hundred ten".