21010100110999 has 6 divisors (see below), whose sum is σ = 21466634656184. Its totient is φ = 20563076702220.

The previous prime is 21010100110969. The next prime is 21010100111003. The reversal of 21010100110999 is 99901100101012.

It is not a de Polignac number, because 21010100110999 - 2⁷ = 21010100110871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010100110969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4755565947 + ... + 4755570364.

Almost surely, 2^{21010100110999} is an apocalyptic number.

21010100110999 is a deficient number, since it is larger than the sum of its proper divisors (456534545185).

21010100110999 is an frugal number, since it uses more digits than its factorization.

21010100110999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9511136405 (or 9511136358 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 21010100110999 in words is "twenty-one trillion, ten billion, one hundred million, one hundred ten thousand, nine hundred ninety-nine".