2120231201111 has 4 divisors (see below), whose sum is σ = 2120749472424. Its totient is φ = 2119712929800.

The previous prime is 2120231201047. The next prime is 2120231201171. The reversal of 2120231201111 is 1111021320212.

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 2120231201111 - 2⁶ = 2120231201047 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 2120231201111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120231201171) 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, 259129520 + ... + 259137701.

It is an arithmetic number, because the mean of its divisors is an integer number (530187368106).

Almost surely, 2^{2120231201111} is an apocalyptic number.

2120231201111 is a deficient number, since it is larger than the sum of its proper divisors (518271313).

2120231201111 is an equidigital number, since it uses as much as digits as its factorization.

2120231201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518271312.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2120231201111 its reverse (1111021320212), we get a palindrome (3231252521323).

The spelling of 2120231201111 in words is "two trillion, one hundred twenty billion, two hundred thirty-one million, two hundred one thousand, one hundred eleven".