133231221231 has 16 divisors (see below), whose sum is σ = 181045349856. Its totient is φ = 87119916416.

The previous prime is 133231221217. The next prime is 133231221283. The reversal of 133231221231 is 132122132331.

It is a cyclic number.

It is not a de Polignac number, because 133231221231 - 2¹³ = 133231213039 is a prime.

It is a super-2 number, since 2×133231221231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231220231) 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, 443161 + ... + 680333.

It is an arithmetic number, because the mean of its divisors is an integer number (11315334366).

Almost surely, 2^133231221231 is an apocalyptic number.

133231221231 is a deficient number, since it is larger than the sum of its proper divisors (47814128625).

133231221231 is a wasteful number, since it uses less digits than its factorization.

133231221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240762.

The product of its digits is 1296, while the sum is 24.

Adding to 133231221231 its reverse (132122132331), we get a palindrome (265353353562).

The spelling of 133231221231 in words is "one hundred thirty-three billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred thirty-one".