2111252511 has 4 divisors (see below), whose sum is σ = 2815003352. Its totient is φ = 1407501672.

The previous prime is 2111252503. The next prime is 2111252531. The reversal of 2111252511 is 1152521112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2111252511 - 2³ = 2111252503 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 (2111252531) 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 3 ways as a sum of consecutive naturals, for example, 351875416 + ... + 351875421.

It is an arithmetic number, because the mean of its divisors is an integer number (703750838).

Almost surely, 2^2111252511 is an apocalyptic number.

2111252511 is a deficient number, since it is larger than the sum of its proper divisors (703750841).

2111252511 is an equidigital number, since it uses as much as digits as its factorization.

2111252511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703750840.

The product of its digits is 200, while the sum is 21.

The square root of 2111252511 is about 45948.3678817866. The cubic root of 2111252511 is about 1282.8623507142.

Adding to 2111252511 its reverse (1152521112), we get a palindrome (3263773623).

The spelling of 2111252511 in words is "two billion, one hundred eleven million, two hundred fifty-two thousand, five hundred eleven".