21101110010122 has 8 divisors (see below), whose sum is σ = 31678465751172. Its totient is φ = 10541621426400.

The previous prime is 21101110010081. The next prime is 21101110010137. The reversal of 21101110010122 is 22101001110112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20888930934481 + 212179075641 = 4570441^2 + 460629^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4466786379 + ... + 4466791102.

Almost surely, 2^{21101110010122} is an apocalyptic number.

21101110010122 is a deficient number, since it is larger than the sum of its proper divisors (10577355741050).

21101110010122 is a wasteful number, since it uses less digits than its factorization.

21101110010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8933578664.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21101110010122 its reverse (22101001110112), we get a palindrome (43202111120234).

The spelling of 21101110010122 in words is "twenty-one trillion, one hundred one billion, one hundred ten million, ten thousand, one hundred twenty-two".