21133453354131 has 4 divisors (see below), whose sum is σ = 28177937805512. Its totient is φ = 14088968902752.

The previous prime is 21133453354093. The next prime is 21133453354163. The reversal of 21133453354131 is 13145335433112.

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

It is not a de Polignac number, because 21133453354131 - 2¹⁷ = 21133453223059 is a prime.

It is a super-2 number, since 2×21133453354131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21133453354131.

It is not an unprimeable number, because it can be changed into a prime (21133453344131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3522242225686 + ... + 3522242225691.

It is an arithmetic number, because the mean of its divisors is an integer number (7044484451378).

Almost surely, 2^{21133453354131} is an apocalyptic number.

21133453354131 is a deficient number, since it is larger than the sum of its proper divisors (7044484451381).

21133453354131 is an equidigital number, since it uses as much as digits as its factorization.

21133453354131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044484451380.

The product of its digits is 194400, while the sum is 39.

Adding to 21133453354131 its reverse (13145335433112), we get a palindrome (34278788787243).

The spelling of 21133453354131 in words is "twenty-one trillion, one hundred thirty-three billion, four hundred fifty-three million, three hundred fifty-four thousand, one hundred thirty-one".