2125111642 has 4 divisors (see below), whose sum is σ = 3187667466. Its totient is φ = 1062555820.

The previous prime is 2125111603. The next prime is 2125111733. The reversal of 2125111642 is 2461115212.

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

It can be written as a sum of positive squares in only one way, i.e., 1339486801 + 785624841 = 36599^2 + 28029^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 531277909 + ... + 531277912.

Almost surely, 2^2125111642 is an apocalyptic number.

2125111642 is a deficient number, since it is larger than the sum of its proper divisors (1062555824).

2125111642 is a wasteful number, since it uses less digits than its factorization.

2125111642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062555823.

The product of its digits is 960, while the sum is 25.

The square root of 2125111642 is about 46098.9331980687. The cubic root of 2125111642 is about 1285.6633096815.

Adding to 2125111642 its reverse (2461115212), we get a palindrome (4586226854).

The spelling of 2125111642 in words is "two billion, one hundred twenty-five million, one hundred eleven thousand, six hundred forty-two".