21101022122 has 8 divisors (see below), whose sum is σ = 31652979876. Its totient is φ = 10550028832.

The previous prime is 21101022077. The next prime is 21101022161. The reversal of 21101022122 is 22122010112.

It can be written as a sum of positive squares in 2 ways, for example, as 20839520881 + 261501241 = 144359^2 + 16171^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21101022097 and 21101022106.

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 in 3 ways as a sum of consecutive naturals, for example, 183683 + ... + 275574.

Almost surely, 2^21101022122 is an apocalyptic number.

21101022122 is a deficient number, since it is larger than the sum of its proper divisors (10551957754).

21101022122 is a wasteful number, since it uses less digits than its factorization.

21101022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482232.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101022122 its reverse (22122010112), we get a palindrome (43223032234).

The spelling of 21101022122 in words is "twenty-one billion, one hundred one million, twenty-two thousand, one hundred twenty-two".