133121013 has 4 divisors (see below), whose sum is σ = 177494688. Its totient is φ = 88747340.

The previous prime is 133120997. The next prime is 133121029. The reversal of 133121013 is 310121331.

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 an interprime number because it is at equal distance from previous prime (133120997) and next prime (133121029).

It is a cyclic number.

It is not a de Polignac number, because 133121013 - 2⁴ = 133120997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133120983 and 133121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133121063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22186833 + ... + 22186838.

It is an arithmetic number, because the mean of its divisors is an integer number (44373672).

Almost surely, 2^133121013 is an apocalyptic number.

It is an amenable number.

133121013 is a deficient number, since it is larger than the sum of its proper divisors (44373675).

133121013 is an equidigital number, since it uses as much as digits as its factorization.

133121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44373674.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 133121013 is about 11537.8079807215. The cubic root of 133121013 is about 510.6016390731.

Adding to 133121013 its reverse (310121331), we get a palindrome (443242344).

The spelling of 133121013 in words is "one hundred thirty-three million, one hundred twenty-one thousand, thirteen".