2222121101111 has 4 divisors (see below), whose sum is σ = 2222424635424. Its totient is φ = 2221817566800.

The previous prime is 2222121101063. The next prime is 2222121101129. The reversal of 2222121101111 is 1111011212222.

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 2222121101111 - 2³⁰ = 2221047359287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2222121101111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222121101191) 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, 151756175 + ... + 151770816.

It is an arithmetic number, because the mean of its divisors is an integer number (555606158856).

Almost surely, 2^{2222121101111} is an apocalyptic number.

2222121101111 is a deficient number, since it is larger than the sum of its proper divisors (303534313).

2222121101111 is an equidigital number, since it uses as much as digits as its factorization.

2222121101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303534312.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2222121101111 its reverse (1111011212222), we get a palindrome (3333132313333).

It can be divided in two parts, 2222121 and 101111, that added together give a palindrome (2323232).

The spelling of 2222121101111 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred one thousand, one hundred eleven".