2211201021111 has 4 divisors (see below), whose sum is σ = 2948268028152. Its totient is φ = 1474134014072.

The previous prime is 2211201021103. The next prime is 2211201021121. The reversal of 2211201021111 is 1111201021122.

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 2211201021111 - 2³ = 2211201021103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211201021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368533503516 + ... + 368533503521.

It is an arithmetic number, because the mean of its divisors is an integer number (737067007038).

Almost surely, 2^{2211201021111} is an apocalyptic number.

2211201021111 is a deficient number, since it is larger than the sum of its proper divisors (737067007041).

2211201021111 is an equidigital number, since it uses as much as digits as its factorization.

2211201021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737067007040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2211201021111 its reverse (1111201021122), we get a palindrome (3322402042233).

The spelling of 2211201021111 in words is "two trillion, two hundred eleven billion, two hundred one million, twenty-one thousand, one hundred eleven".