2100722126 has 16 divisors (see below), whose sum is σ = 3263693040. Its totient is φ = 1014118168.

The previous prime is 2100722083. The next prime is 2100722131. The reversal of 2100722126 is 6212270012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27245 + ... + 70311.

It is an arithmetic number, because the mean of its divisors is an integer number (203980815).

Almost surely, 2^2100722126 is an apocalyptic number.

2100722126 is a deficient number, since it is larger than the sum of its proper divisors (1162970914).

2100722126 is an frugal number, since it uses more digits than its factorization.

2100722126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43156 (or 43098 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2100722126 is about 45833.6353129446. The cubic root of 2100722126 is about 1280.7259322151.

Adding to 2100722126 its reverse (6212270012), we get a palindrome (8312992138).

The spelling of 2100722126 in words is "two billion, one hundred million, seven hundred twenty-two thousand, one hundred twenty-six".