21102110122 has 8 divisors (see below), whose sum is σ = 32053838400. Its totient is φ = 10417497324.

The previous prime is 21102110039. The next prime is 21102110123. The reversal of 21102110122 is 22101120112.

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

It is not an unprimeable number, because it can be changed into a prime (21102110123) by changing a digit.

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, 66778672 + ... + 66778987.

It is an arithmetic number, because the mean of its divisors is an integer number (4006729800).

Almost surely, 2^21102110122 is an apocalyptic number.

21102110122 is a deficient number, since it is larger than the sum of its proper divisors (10951728278).

21102110122 is a wasteful number, since it uses less digits than its factorization.

21102110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133557740.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102110122 its reverse (22101120112), we get a palindrome (43203230234).

The spelling of 21102110122 in words is "twenty-one billion, one hundred two million, one hundred ten thousand, one hundred twenty-two".