2221122212111 has 8 divisors (see below), whose sum is σ = 2426956867200. Its totient is φ = 2015939966040.

The previous prime is 2221122212059. The next prime is 2221122212143. The reversal of 2221122212111 is 1112122211222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2221122212111 is a prime.

It is a super-2 number, since 2×2221122212111² (a number of 25 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 (2221122212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163095131 + ... + 163108748.

It is an arithmetic number, because the mean of its divisors is an integer number (303369608400).

Almost surely, 2^{2221122212111} is an apocalyptic number.

2221122212111 is a deficient number, since it is larger than the sum of its proper divisors (205834655089).

2221122212111 is a wasteful number, since it uses less digits than its factorization.

2221122212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326204509.

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

Adding to 2221122212111 its reverse (1112122211222), we get a palindrome (3333244423333).

The spelling of 2221122212111 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".