133231221229 has 4 divisors (see below), whose sum is σ = 136832065084. Its totient is φ = 129630377376.

The previous prime is 133231221217. The next prime is 133231221283. The reversal of 133231221229 is 922122132331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 922122132331 = 70099 ⋅13154569.

It can be written as a sum of positive squares in 2 ways, for example, as 68122044004 + 65109177225 = 261002^2 + 255165^2 .

It is a cyclic number.

It is not a de Polignac number, because 133231221229 - 2³⁵ = 98871482861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133231221229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231231229) 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, 1800421872 + ... + 1800421945.

It is an arithmetic number, because the mean of its divisors is an integer number (34208016271).

Almost surely, 2^133231221229 is an apocalyptic number.

It is an amenable number.

133231221229 is a deficient number, since it is larger than the sum of its proper divisors (3600843855).

133231221229 is an equidigital number, since it uses as much as digits as its factorization.

133231221229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600843854.

The product of its digits is 7776, while the sum is 31.

The spelling of 133231221229 in words is "one hundred thirty-three billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty-nine".