31133320201 has 4 divisors (see below), whose sum is σ = 31133840404. Its totient is φ = 31132800000.

The previous prime is 31133320159. The next prime is 31133320217. The reversal of 31133320201 is 10202333113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4146716025 + 26986604176 = 64395^2 + 164276^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133320201 - 2²¹ = 31131223049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31133320601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156600 + ... + 294601.

It is an arithmetic number, because the mean of its divisors is an integer number (7783460101).

Almost surely, 2^31133320201 is an apocalyptic number.

It is an amenable number.

31133320201 is a deficient number, since it is larger than the sum of its proper divisors (520203).

31133320201 is an equidigital number, since it uses as much as digits as its factorization.

31133320201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520202.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31133320201 its reverse (10202333113), we get a palindrome (41335653314).

The spelling of 31133320201 in words is "thirty-one billion, one hundred thirty-three million, three hundred twenty thousand, two hundred one".