133000021243 has 4 divisors (see below), whose sum is σ = 133401834328. Its totient is φ = 132598208160.

The previous prime is 133000021211. The next prime is 133000021247. The reversal of 133000021243 is 342120000331.

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 133000021243 - 2⁵ = 133000021211 is a prime.

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 133000021243.

It is not an unprimeable number, because it can be changed into a prime (133000021247) 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, 200906046 + ... + 200906707.

It is an arithmetic number, because the mean of its divisors is an integer number (33350458582).

Almost surely, 2^133000021243 is an apocalyptic number.

133000021243 is a deficient number, since it is larger than the sum of its proper divisors (401813085).

133000021243 is an equidigital number, since it uses as much as digits as its factorization.

133000021243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401813084.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 133000021243 its reverse (342120000331), we get a palindrome (475120021574).

The spelling of 133000021243 in words is "one hundred thirty-three billion, twenty-one thousand, two hundred forty-three".