21011222010211 has 8 divisors (see below), whose sum is σ = 21468939830784. Its totient is φ = 20553948795720.

The previous prime is 21011222010101. The next prime is 21011222010221. The reversal of 21011222010211 is 11201022211012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011222010211 - 2⁷ = 21011222010083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011222010221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111055975 + ... + 111245008.

It is an arithmetic number, because the mean of its divisors is an integer number (2683617478848).

Almost surely, 2^{21011222010211} is an apocalyptic number.

21011222010211 is a deficient number, since it is larger than the sum of its proper divisors (457717820573).

21011222010211 is a wasteful number, since it uses less digits than its factorization.

21011222010211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222303041.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011222010211 its reverse (11201022211012), we get a palindrome (32212244221223).

The spelling of 21011222010211 in words is "twenty-one trillion, eleven billion, two hundred twenty-two million, ten thousand, two hundred eleven".