133121321313 has 16 divisors (see below), whose sum is σ = 182370287040. Its totient is φ = 86312005056.

The previous prime is 133121321309. The next prime is 133121321321. The reversal of 133121321313 is 313123121331.

It is not a de Polignac number, because 133121321313 - 2² = 133121321309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133121321413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5023 + ... + 516011.

It is an arithmetic number, because the mean of its divisors is an integer number (11398142940).

Almost surely, 2^133121321313 is an apocalyptic number.

It is an amenable number.

133121321313 is a deficient number, since it is larger than the sum of its proper divisors (49248965727).

133121321313 is a wasteful number, since it uses less digits than its factorization.

133121321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513376.

The product of its digits is 972, while the sum is 24.

Adding to 133121321313 its reverse (313123121331), we get a palindrome (446244442644).

The spelling of 133121321313 in words is "one hundred thirty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, three hundred thirteen".