211222211211101 has 4 divisors (see below), whose sum is σ = 211234489447872. Its totient is φ = 211209932974332.

The previous prime is 211222211211071. The next prime is 211222211211113. The reversal of 211222211211101 is 101112112222112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211222211211101 - 2¹⁴ = 211222211194717 is a prime.

It is a super-2 number, since 2×211222211211101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222211211131) 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, 6139092581 + ... + 6139126986.

It is an arithmetic number, because the mean of its divisors is an integer number (52808622361968).

Almost surely, 2^{211222211211101} is an apocalyptic number.

It is an amenable number.

211222211211101 is a deficient number, since it is larger than the sum of its proper divisors (12278236771).

211222211211101 is a wasteful number, since it uses less digits than its factorization.

211222211211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12278236770.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211222211211101 its reverse (101112112222112), we get a palindrome (312334323433213).

It can be divided in two parts, 21122221 and 1211101, that added together give a palindrome (22333322).

The spelling of 211222211211101 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, one hundred one".