21100322211 has 16 divisors (see below), whose sum is σ = 28932505344. Its totient is φ = 13672471904.

The previous prime is 21100322209. The next prime is 21100322219. The reversal of 21100322211 is 11222300112.

It is not a de Polignac number, because 21100322211 - 2¹ = 21100322209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100322219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603111 + ... + 637136.

It is an arithmetic number, because the mean of its divisors is an integer number (1808281584).

Almost surely, 2^21100322211 is an apocalyptic number.

21100322211 is a deficient number, since it is larger than the sum of its proper divisors (7832183133).

21100322211 is a wasteful number, since it uses less digits than its factorization.

21100322211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240410.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21100322211 its reverse (11222300112), we get a palindrome (32322622323).

The spelling of 21100322211 in words is "twenty-one billion, one hundred million, three hundred twenty-two thousand, two hundred eleven".