21222211202211 has 16 divisors (see below), whose sum is σ = 29533348686240. Its totient is φ = 13542629018880.

The previous prime is 21222211202201. The next prime is 21222211202287. The reversal of 21222211202211 is 11220211222212.

It is not a de Polignac number, because 21222211202211 - 2⁶ = 21222211202147 is a prime.

It is a super-2 number, since 2×21222211202211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222211202201) 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, 1627713316 + ... + 1627726353.

It is an arithmetic number, because the mean of its divisors is an integer number (1845834292890).

Almost surely, 2^{21222211202211} is an apocalyptic number.

21222211202211 is a deficient number, since it is larger than the sum of its proper divisors (8311137484029).

21222211202211 is a wasteful number, since it uses less digits than its factorization.

21222211202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255439766.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222211202211 its reverse (11220211222212), we get a palindrome (32442422424423).

The spelling of 21222211202211 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred two thousand, two hundred eleven".