2101126131 has 18 divisors (see below), whose sum is σ = 3286379148. Its totient is φ = 1292999760.

The previous prime is 2101126123. The next prime is 2101126163. The reversal of 2101126131 is 1316211012.

It is not a de Polignac number, because 2101126131 - 2³ = 2101126123 is a prime.

It is a super-2 number, since 2×2101126131² = 8829462036742058322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101126831) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 689185 + ... + 692226.

Almost surely, 2^2101126131 is an apocalyptic number.

2101126131 is a deficient number, since it is larger than the sum of its proper divisors (1185253017).

2101126131 is a wasteful number, since it uses less digits than its factorization.

2101126131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381443 (or 1381427 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 2101126131 is about 45838.0423992997. The cubic root of 2101126131 is about 1280.8080288281.

Adding to 2101126131 its reverse (1316211012), we get a palindrome (3417337143).

The spelling of 2101126131 in words is "two billion, one hundred one million, one hundred twenty-six thousand, one hundred thirty-one".