2125500111 has 12 divisors (see below), whose sum is σ = 3508762192. Its totient is φ = 1214571456.

The previous prime is 2125500101. The next prime is 2125500121. The reversal of 2125500111 is 1110055212.

2125500111 is a `hidden beast` number, since 2 + 1 + 2 + 550 + 0 + 111 = 666.

It is an interprime number because it is at equal distance from previous prime (2125500101) and next prime (2125500121).

It is not a de Polignac number, because 2125500111 - 2⁵ = 2125500079 is a prime.

It is a super-2 number, since 2×2125500111² = 9035501443722024642, 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 (2125500101) 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 11 ways as a sum of consecutive naturals, for example, 16868986 + ... + 16869111.

Almost surely, 2^2125500111 is an apocalyptic number.

2125500111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2125500111 is a deficient number, since it is larger than the sum of its proper divisors (1383262081).

2125500111 is a wasteful number, since it uses less digits than its factorization.

2125500111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33738110 (or 33738107 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 2125500111 is about 46103.1464327545. The cubic root of 2125500111 is about 1285.7416443755.

Adding to 2125500111 its reverse (1110055212), we get a palindrome (3235555323).

The spelling of 2125500111 in words is "two billion, one hundred twenty-five million, five hundred thousand, one hundred eleven".