2221121123111 has 4 divisors (see below), whose sum is σ = 2423041225224. Its totient is φ = 2019201021000.

The previous prime is 2221121123069. The next prime is 2221121123131. The reversal of 2221121123111 is 1113211211222.

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 2221121123111 - 2⁶ = 2221121123047 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 (2221121123131) 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 3 ways as a sum of consecutive naturals, for example, 100960051040 + ... + 100960051061.

It is an arithmetic number, because the mean of its divisors is an integer number (605760306306).

Almost surely, 2^{2221121123111} is an apocalyptic number.

2221121123111 is a deficient number, since it is larger than the sum of its proper divisors (201920102113).

2221121123111 is a wasteful number, since it uses less digits than its factorization.

2221121123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201920102112.

The product of its digits is 96, while the sum is 20.

Adding to 2221121123111 its reverse (1113211211222), we get a palindrome (3334332334333).

The spelling of 2221121123111 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred eleven".