2120031111 has 32 divisors (see below), whose sum is σ = 3148906752. Its totient is φ = 1257800960.

The previous prime is 2120031101. The next prime is 2120031139. The reversal of 2120031111 is 1111300212.

It is a cyclic number.

It is not a de Polignac number, because 2120031111 - 2⁵ = 2120031079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120031101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 983611 + ... + 985763.

It is an arithmetic number, because the mean of its divisors is an integer number (98403336).

Almost surely, 2^2120031111 is an apocalyptic number.

2120031111 is a deficient number, since it is larger than the sum of its proper divisors (1028875641).

2120031111 is a wasteful number, since it uses less digits than its factorization.

2120031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2120031111 is about 46043.7955755170. The cubic root of 2120031111 is about 1284.6379416716.

Adding to 2120031111 its reverse (1111300212), we get a palindrome (3231331323).

The spelling of 2120031111 in words is "two billion, one hundred twenty million, thirty-one thousand, one hundred eleven".