133011221213 has 4 divisors (see below), whose sum is σ = 143242853628. Its totient is φ = 122779588800.

The previous prime is 133011221149. The next prime is 133011221243. The reversal of 133011221213 is 312122110331.

It is a happy number.

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 78499711684 + 54511509529 = 280178^2 + 233477^2 .

It is a cyclic number.

It is not a de Polignac number, because 133011221213 - 2⁶ = 133011221149 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 (133011221243) 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, 5115816188 + ... + 5115816213.

It is an arithmetic number, because the mean of its divisors is an integer number (35810713407).

Almost surely, 2^133011221213 is an apocalyptic number.

133011221213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133011221213 is a deficient number, since it is larger than the sum of its proper divisors (10231632415).

133011221213 is a wasteful number, since it uses less digits than its factorization.

133011221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10231632414.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 133011221213 its reverse (312122110331), we get a palindrome (445133331544).

The spelling of 133011221213 in words is "one hundred thirty-three billion, eleven million, two hundred twenty-one thousand, two hundred thirteen".