21114220211 has 16 divisors (see below), whose sum is σ = 25543161600. Its totient is φ = 17067462048.

The previous prime is 21114220147. The next prime is 21114220213. The reversal of 21114220211 is 11202241112.

It is not a de Polignac number, because 21114220211 - 2⁶ = 21114220147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21114220211.

It is not an unprimeable number, because it can be changed into a prime (21114220213) 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, 1200701 + ... + 1218158.

It is an arithmetic number, because the mean of its divisors is an integer number (1596447600).

Almost surely, 2^21114220211 is an apocalyptic number.

21114220211 is a deficient number, since it is larger than the sum of its proper divisors (4428941389).

21114220211 is a wasteful number, since it uses less digits than its factorization.

21114220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418938.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21114220211 its reverse (11202241112), we get a palindrome (32316461323).

The spelling of 21114220211 in words is "twenty-one billion, one hundred fourteen million, two hundred twenty thousand, two hundred eleven".