2101690133 has 4 divisors (see below), whose sum is σ = 2109277740. Its totient is φ = 2094102528.

The previous prime is 2101690109. The next prime is 2101690141. The reversal of 2101690133 is 3310961012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 530519089 + 1571171044 = 23033^2 + 39638^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101690133 - 2¹⁸ = 2101427989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101690193) 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, 3793388 + ... + 3793941.

It is an arithmetic number, because the mean of its divisors is an integer number (527319435).

Almost surely, 2^2101690133 is an apocalyptic number.

It is an amenable number.

2101690133 is a deficient number, since it is larger than the sum of its proper divisors (7587607).

2101690133 is an equidigital number, since it uses as much as digits as its factorization.

2101690133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587606.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2101690133 is about 45844.1941035067. The cubic root of 2101690133 is about 1280.9226203406.

The spelling of 2101690133 in words is "two billion, one hundred one million, six hundred ninety thousand, one hundred thirty-three".