20101133 has 4 divisors (see below), whose sum is σ = 21647388. Its totient is φ = 18554880.

The previous prime is 20101129. The next prime is 20101141. The reversal of 20101133 is 33110102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33110102 = 2 ⋅16555051.

It can be written as a sum of positive squares in 2 ways, for example, as 2778889 + 17322244 = 1667^2 + 4162^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101133 - 2² = 20101129 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 (20101933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773108 + ... + 773133.

It is an arithmetic number, because the mean of its divisors is an integer number (5411847).

Almost surely, 2^20101133 is an apocalyptic number.

It is an amenable number.

20101133 is a deficient number, since it is larger than the sum of its proper divisors (1546255).

20101133 is a wasteful number, since it uses less digits than its factorization.

20101133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546254.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 20101133 is about 4483.4287102618. The cubic root of 20101133 is about 271.8985212926.

Adding to 20101133 its reverse (33110102), we get a palindrome (53211235).

The spelling of 20101133 in words is "twenty million, one hundred one thousand, one hundred thirty-three".