202111213133 has 4 divisors (see below), whose sum is σ = 209080565340. Its totient is φ = 195141860928.

The previous prime is 202111213097. The next prime is 202111213141. The reversal of 202111213133 is 331312111202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331312111202 = 2 ⋅165656055601.

It can be written as a sum of positive squares in 2 ways, for example, as 129385528804 + 72725684329 = 359702^2 + 269677^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111213133 - 2⁶ = 202111213069 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 (202111233133) 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, 3484676060 + ... + 3484676117.

It is an arithmetic number, because the mean of its divisors is an integer number (52270141335).

Almost surely, 2^202111213133 is an apocalyptic number.

It is an amenable number.

202111213133 is a deficient number, since it is larger than the sum of its proper divisors (6969352207).

202111213133 is an equidigital number, since it uses as much as digits as its factorization.

202111213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6969352206.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 202111213133 its reverse (331312111202), we get a palindrome (533423324335).

The spelling of 202111213133 in words is "two hundred two billion, one hundred eleven million, two hundred thirteen thousand, one hundred thirty-three".