21221330122 has 8 divisors (see below), whose sum is σ = 31926453156. Its totient is φ = 10579179072.

The previous prime is 21221330113. The next prime is 21221330149. The reversal of 21221330122 is 22103312212.

It can be written as a sum of positive squares in 2 ways, for example, as 19965407401 + 1255922721 = 141299^2 + 35439^2 .

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 21221330122.

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, 15742153 + ... + 15743500.

Almost surely, 2^21221330122 is an apocalyptic number.

21221330122 is a deficient number, since it is larger than the sum of its proper divisors (10705123034).

21221330122 is a wasteful number, since it uses less digits than its factorization.

21221330122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31485992.

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

Adding to 21221330122 its reverse (22103312212), we get a palindrome (43324642334).

The spelling of 21221330122 in words is "twenty-one billion, two hundred twenty-one million, three hundred thirty thousand, one hundred twenty-two".