2221100011111 has 4 divisors (see below), whose sum is σ = 2223396909712. Its totient is φ = 2218803112512.

The previous prime is 2221100011069. The next prime is 2221100011129. The reversal of 2221100011111 is 1111100011222.

It is a happy number.

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 2221100011111 - 2¹⁷ = 2221099880039 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2221100011091 and 2221100011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221100011181) 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, 1148447850 + ... + 1148449783.

It is an arithmetic number, because the mean of its divisors is an integer number (555849227428).

Almost surely, 2^{2221100011111} is an apocalyptic number.

2221100011111 is a deficient number, since it is larger than the sum of its proper divisors (2296898601).

2221100011111 is an equidigital number, since it uses as much as digits as its factorization.

2221100011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296898600.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2221100011111 its reverse (1111100011222), we get a palindrome (3332200022333).

The spelling of 2221100011111 in words is "two trillion, two hundred twenty-one billion, one hundred million, eleven thousand, one hundred eleven".