2125111361 has 4 divisors (see below), whose sum is σ = 2126458800. Its totient is φ = 2123763924.

The previous prime is 2125111357. The next prime is 2125111363. The reversal of 2125111361 is 1631115212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125111361 - 2² = 2125111357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125111363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671351 + ... + 674508.

It is an arithmetic number, because the mean of its divisors is an integer number (531614700).

Almost surely, 2^2125111361 is an apocalyptic number.

It is an amenable number.

2125111361 is a deficient number, since it is larger than the sum of its proper divisors (1347439).

2125111361 is a wasteful number, since it uses less digits than its factorization.

2125111361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347438.

The product of its digits is 360, while the sum is 23.

The square root of 2125111361 is about 46098.9301502757. The cubic root of 2125111361 is about 1285.6632530144.

Adding to 2125111361 its reverse (1631115212), we get a palindrome (3756226573).

The spelling of 2125111361 in words is "two billion, one hundred twenty-five million, one hundred eleven thousand, three hundred sixty-one".