2125451111 has 16 divisors (see below), whose sum is σ = 2493566208. Its totient is φ = 1773643200.

The previous prime is 2125451087. The next prime is 2125451113. The reversal of 2125451111 is 1111545212.

It is a happy number.

It is not a de Polignac number, because 2125451111 - 2¹⁰ = 2125450087 is a prime.

It is a super-2 number, since 2×2125451111² = 9035084850502268642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125451113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133376 + ... + 148458.

It is an arithmetic number, because the mean of its divisors is an integer number (155847888).

Almost surely, 2^2125451111 is an apocalyptic number.

2125451111 is a deficient number, since it is larger than the sum of its proper divisors (368115097).

2125451111 is a wasteful number, since it uses less digits than its factorization.

2125451111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15622.

The product of its digits is 400, while the sum is 23.

The square root of 2125451111 is about 46102.6150125999. The cubic root of 2125451111 is about 1285.7317640616.

Adding to 2125451111 its reverse (1111545212), we get a palindrome (3236996323).

The spelling of 2125451111 in words is "two billion, one hundred twenty-five million, four hundred fifty-one thousand, one hundred eleven".