133821110243 has 4 divisors (see below), whose sum is σ = 139639419408. Its totient is φ = 128002801080.

The previous prime is 133821110237. The next prime is 133821110261. The reversal of 133821110243 is 342011128331.

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

It is a cyclic number.

It is not a de Polignac number, because 133821110243 - 2⁸ = 133821109987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133821110233) 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, 2909154548 + ... + 2909154593.

It is an arithmetic number, because the mean of its divisors is an integer number (34909854852).

Almost surely, 2^133821110243 is an apocalyptic number.

133821110243 is a deficient number, since it is larger than the sum of its proper divisors (5818309165).

133821110243 is an equidigital number, since it uses as much as digits as its factorization.

133821110243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818309164.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 133821110243 its reverse (342011128331), we get a palindrome (475832238574).

The spelling of 133821110243 in words is "one hundred thirty-three billion, eight hundred twenty-one million, one hundred ten thousand, two hundred forty-three".