133161013321 has 4 divisors (see below), whose sum is σ = 152184015232. Its totient is φ = 114138011412.

The previous prime is 133161013319. The next prime is 133161013333. The reversal of 133161013321 is 123310161331.

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 not a de Polignac number, because 133161013321 - 2¹ = 133161013319 is a prime.

It is a super-4 number, since 4×133161013321⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133161013301) 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, 9511500945 + ... + 9511500958.

It is an arithmetic number, because the mean of its divisors is an integer number (38046003808).

Almost surely, 2^133161013321 is an apocalyptic number.

It is an amenable number.

133161013321 is a deficient number, since it is larger than the sum of its proper divisors (19023001911).

133161013321 is an equidigital number, since it uses as much as digits as its factorization.

133161013321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19023001910.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 133161013321 its reverse (123310161331), we get a palindrome (256471174652).

The spelling of 133161013321 in words is "one hundred thirty-three billion, one hundred sixty-one million, thirteen thousand, three hundred twenty-one".