2031220133 has 4 divisors (see below), whose sum is σ = 2035258848. Its totient is φ = 2027181420.

The previous prime is 2031220127. The next prime is 2031220141. The reversal of 2031220133 is 3310221302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3310221302 = 2 ⋅1655110651.

It is a cyclic number.

It is not a de Polignac number, because 2031220133 - 2¹² = 2031216037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031229133) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2018603 + ... + 2019608.

It is an arithmetic number, because the mean of its divisors is an integer number (508814712).

Almost surely, 2^2031220133 is an apocalyptic number.

It is an amenable number.

2031220133 is a deficient number, since it is larger than the sum of its proper divisors (4038715).

2031220133 is an equidigital number, since it uses as much as digits as its factorization.

2031220133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038714.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2031220133 is about 45069.0595974666. The cubic root of 2031220133 is about 1266.4430475588.

Adding to 2031220133 its reverse (3310221302), we get a palindrome (5341441435).

The spelling of 2031220133 in words is "two billion, thirty-one million, two hundred twenty thousand, one hundred thirty-three".