22222111212101 has 16 divisors (see below), whose sum is σ = 23000801180400. Its totient is φ = 21444251931648.

The previous prime is 22222111212089. The next prime is 22222111212139. The reversal of 22222111212101 is 10121211122222.

It can be written as a sum of positive squares in 8 ways, for example, as 4363043664100 + 17859067548001 = 2088790^2 + 4225999^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222111212101 - 2¹⁸ = 22222110949957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222111212151) 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, 428203511 + ... + 428255403.

It is an arithmetic number, because the mean of its divisors is an integer number (1437550073775).

Almost surely, 2^{22222111212101} is an apocalyptic number.

It is an amenable number.

22222111212101 is a deficient number, since it is larger than the sum of its proper divisors (778689968299).

22222111212101 is a wasteful number, since it uses less digits than its factorization.

22222111212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59608.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22222111212101 its reverse (10121211122222), we get a palindrome (32343322334323).

The spelling of 22222111212101 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, one hundred one".