22101220211 has 4 divisors (see below), whose sum is σ = 25258537392. Its totient is φ = 18943903032.

The previous prime is 22101220181. The next prime is 22101220231. The reversal of 22101220211 is 11202210122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22101220211 - 2¹⁴ = 22101203827 is a prime.

It is a super-2 number, since 2×22101220211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101220231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578658580 + ... + 1578658593.

It is an arithmetic number, because the mean of its divisors is an integer number (6314634348).

Almost surely, 2^22101220211 is an apocalyptic number.

22101220211 is a deficient number, since it is larger than the sum of its proper divisors (3157317181).

22101220211 is an equidigital number, since it uses as much as digits as its factorization.

22101220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157317180.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22101220211 its reverse (11202210122), we get a palindrome (33303430333).

The spelling of 22101220211 in words is "twenty-two billion, one hundred one million, two hundred twenty thousand, two hundred eleven".