2120321111 has 8 divisors (see below), whose sum is σ = 2127805680. Its totient is φ = 2112846912.

The previous prime is 2120321087. The next prime is 2120321197. The reversal of 2120321111 is 1111230212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120321111 is a prime.

It is a super-2 number, since 2×2120321111² = 8991523227504548642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120321711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775595 + ... + 778323.

It is an arithmetic number, because the mean of its divisors is an integer number (265975710).

Almost surely, 2^2120321111 is an apocalyptic number.

2120321111 is a deficient number, since it is larger than the sum of its proper divisors (7484569).

2120321111 is a wasteful number, since it uses less digits than its factorization.

2120321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2120321111 is about 46046.9446434831. The cubic root of 2120321111 is about 1284.6965143997.

Adding to 2120321111 its reverse (1111230212), we get a palindrome (3231551323).

The spelling of 2120321111 in words is "two billion, one hundred twenty million, three hundred twenty-one thousand, one hundred eleven".