133431311012 has 12 divisors (see below), whose sum is σ = 235647040860. Its totient is φ = 66103585056.

The previous prime is 133431311011. The next prime is 133431311021. The reversal of 133431311012 is 210113134331.

It can be written as a sum of positive squares in 2 ways, for example, as 43728664996 + 89702646016 = 209114^2 + 299504^2 .

It is not an unprimeable number, because it can be changed into a prime (133431311011) 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, 153017123 + ... + 153017994.

It is an arithmetic number, because the mean of its divisors is an integer number (19637253405).

Almost surely, 2^133431311012 is an apocalyptic number.

It is an amenable number.

133431311012 is a deficient number, since it is larger than the sum of its proper divisors (102215729848).

133431311012 is a wasteful number, since it uses less digits than its factorization.

133431311012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306035230 (or 306035228 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 133431311012 its reverse (210113134331), we get a palindrome (343544445343).

The spelling of 133431311012 in words is "one hundred thirty-three billion, four hundred thirty-one million, three hundred eleven thousand, twelve".