2111231203111 has 4 divisors (see below), whose sum is σ = 2137955648800. Its totient is φ = 2084506757424.

The previous prime is 2111231203091. The next prime is 2111231203153. The reversal of 2111231203111 is 1113021321112.

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 2111231203111 - 2¹⁷ = 2111231072039 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 (2111231201111) 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, 13362222726 + ... + 13362222883.

It is an arithmetic number, because the mean of its divisors is an integer number (534488912200).

Almost surely, 2^{2111231203111} is an apocalyptic number.

2111231203111 is a deficient number, since it is larger than the sum of its proper divisors (26724445689).

2111231203111 is an equidigital number, since it uses as much as digits as its factorization.

2111231203111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26724445688.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 2111231203111 its reverse (1113021321112), we get a palindrome (3224252524223).

The spelling of 2111231203111 in words is "two trillion, one hundred eleven billion, two hundred thirty-one million, two hundred three thousand, one hundred eleven".