2111511045 has 16 divisors (see below), whose sum is σ = 3861048960. Its totient is φ = 965262144.

The previous prime is 2111511041. The next prime is 2111511047. The reversal of 2111511045 is 5401151112.

It is not a de Polignac number, because 2111511045 - 2² = 2111511041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111511041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10054710 + ... + 10054919.

It is an arithmetic number, because the mean of its divisors is an integer number (241315560).

Almost surely, 2^2111511045 is an apocalyptic number.

It is an amenable number.

2111511045 is a deficient number, since it is larger than the sum of its proper divisors (1749537915).

2111511045 is a wasteful number, since it uses less digits than its factorization.

2111511045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20109644.

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

The square root of 2111511045 is about 45951.1811056038. The cubic root of 2111511045 is about 1282.9147129962.

Adding to 2111511045 its reverse (5401151112), we get a palindrome (7512662157).

The spelling of 2111511045 in words is "two billion, one hundred eleven million, five hundred eleven thousand, forty-five".