133233213221 has 4 divisors (see below), whose sum is σ = 133244395872. Its totient is φ = 133222030572.

The previous prime is 133233213203. The next prime is 133233213283. The reversal of 133233213221 is 122312332331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133233213221 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 (133233215221) 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, 5573435 + ... + 5597288.

It is an arithmetic number, because the mean of its divisors is an integer number (33311098968).

Almost surely, 2^133233213221 is an apocalyptic number.

It is an amenable number.

133233213221 is a deficient number, since it is larger than the sum of its proper divisors (11182651).

133233213221 is a wasteful number, since it uses less digits than its factorization.

133233213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182650.

The product of its digits is 3888, while the sum is 26.

Adding to 133233213221 its reverse (122312332331), we get a palindrome (255545545552).

The spelling of 133233213221 in words is "one hundred thirty-three billion, two hundred thirty-three million, two hundred thirteen thousand, two hundred twenty-one".