21110022210021 has 8 divisors (see below), whose sum is σ = 28368323810304. Its totient is φ = 13962534374880.

The previous prime is 21110022209993. The next prime is 21110022210029. The reversal of 21110022210021 is 12001222001112.

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

It is not a de Polignac number, because 21110022210021 - 2¹⁰ = 21110022208997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110022210029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 27703440840 + ... + 27703441601.

It is an arithmetic number, because the mean of its divisors is an integer number (3546040476288).

Almost surely, 2^{21110022210021} is an apocalyptic number.

It is an amenable number.

21110022210021 is a deficient number, since it is larger than the sum of its proper divisors (7258301600283).

21110022210021 is a wasteful number, since it uses less digits than its factorization.

21110022210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55406882571.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21110022210021 its reverse (12001222001112), we get a palindrome (33111244211133).

The spelling of 21110022210021 in words is "twenty-one trillion, one hundred ten billion, twenty-two million, two hundred ten thousand, twenty-one".