21222010101211 has 16 divisors (see below), whose sum is σ = 22869981158400. Its totient is φ = 19644184255168.

The previous prime is 21222010101209. The next prime is 21222010101223. The reversal of 21222010101211 is 11210101022212.

It is not a de Polignac number, because 21222010101211 - 2¹ = 21222010101209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222010101251) 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, 110194981 + ... + 110387398.

It is an arithmetic number, because the mean of its divisors is an integer number (1429373822400).

Almost surely, 2^{21222010101211} is an apocalyptic number.

21222010101211 is a deficient number, since it is larger than the sum of its proper divisors (1647971057189).

21222010101211 is a wasteful number, since it uses less digits than its factorization.

21222010101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220582538.

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

Adding to 21222010101211 its reverse (11210101022212), we get a palindrome (32432111123423).

The spelling of 21222010101211 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred one thousand, two hundred eleven".