21100222011021 has 8 divisors (see below), whose sum is σ = 29103754498080. Its totient is φ = 13581752098992.

The previous prime is 21100222011007. The next prime is 21100222011049. The reversal of 21100222011021 is 12011022200112.

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

It is not a de Polignac number, because 21100222011021 - 2¹¹ = 21100222008973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100222011521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121265643655 + ... + 121265643828.

It is an arithmetic number, because the mean of its divisors is an integer number (3637969312260).

Almost surely, 2^{21100222011021} is an apocalyptic number.

It is an amenable number.

21100222011021 is a deficient number, since it is larger than the sum of its proper divisors (8003532487059).

21100222011021 is a wasteful number, since it uses less digits than its factorization.

21100222011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242531287515.

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

Adding to 21100222011021 its reverse (12011022200112), we get a palindrome (33111244211133).

The spelling of 21100222011021 in words is "twenty-one trillion, one hundred billion, two hundred twenty-two million, eleven thousand, twenty-one".