21323210122 has 8 divisors (see below), whose sum is σ = 32150540196. Its totient is φ = 10606363392.

The previous prime is 21323210033. The next prime is 21323210147. The reversal of 21323210122 is 22101232312.

It can be written as a sum of positive squares in 2 ways, for example, as 21315708001 + 7502121 = 145999^2 + 2739^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21323210122.

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, 27620353 + ... + 27621124.

Almost surely, 2^21323210122 is an apocalyptic number.

21323210122 is a deficient number, since it is larger than the sum of its proper divisors (10827330074).

21323210122 is a wasteful number, since it uses less digits than its factorization.

21323210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55241672.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21323210122 its reverse (22101232312), we get a palindrome (43424442434).

The spelling of 21323210122 in words is "twenty-one billion, three hundred twenty-three million, two hundred ten thousand, one hundred twenty-two".