2221101111111 has 16 divisors (see below), whose sum is σ = 3010114840320. Its totient is φ = 1456507059840.

The previous prime is 2221101111011. The next prime is 2221101111113. The reversal of 2221101111111 is 1111111011222.

It is not a de Polignac number, because 2221101111111 - 2²² = 2221096916807 is a prime.

2221101111111 is a modest number, since divided by 1111111 gives 222110 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221101111113) 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, 11949001 + ... + 12133458.

It is an arithmetic number, because the mean of its divisors is an integer number (188132177520).

Almost surely, 2^{2221101111111} is an apocalyptic number.

2221101111111 is a deficient number, since it is larger than the sum of its proper divisors (789013729209).

2221101111111 is a wasteful number, since it uses less digits than its factorization.

2221101111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24082966.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 2221101111111 its reverse (1111111011222), we get a palindrome (3332212122333).

It can be divided in two parts, 222110111 and 1111, that added together give a palindrome (222111222).

The spelling of 2221101111111 in words is "two trillion, two hundred twenty-one billion, one hundred one million, one hundred eleven thousand, one hundred eleven".