133321021213 has 4 divisors (see below), whose sum is σ = 133323365980. Its totient is φ = 133318676448.

The previous prime is 133321021201. The next prime is 133321021219. The reversal of 133321021213 is 312120123331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45670681849 + 87650339364 = 213707^2 + 296058^2 .

It is a cyclic number.

It is not a de Polignac number, because 133321021213 - 2⁵ = 133321021181 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 (133321021219) 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, 1084920 + ... + 1201537.

It is an arithmetic number, because the mean of its divisors is an integer number (33330841495).

Almost surely, 2^133321021213 is an apocalyptic number.

It is an amenable number.

133321021213 is a deficient number, since it is larger than the sum of its proper divisors (2344767).

133321021213 is an equidigital number, since it uses as much as digits as its factorization.

133321021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344766.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 133321021213 its reverse (312120123331), we get a palindrome (445441144544).

The spelling of 133321021213 in words is "one hundred thirty-three billion, three hundred twenty-one million, twenty-one thousand, two hundred thirteen".