31212201333113 has 4 divisors (see below), whose sum is σ = 31212401704548. Its totient is φ = 31212000961680.

The previous prime is 31212201333041. The next prime is 31212201333163. The reversal of 31212201333113 is 31133310221213.

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 30586507677049 + 625693656064 = 5530507^2 + 791008^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212201333113 - 2³⁴ = 31195021463929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212201333163) 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, 99951878 + ... + 100263663.

It is an arithmetic number, because the mean of its divisors is an integer number (7803100426137).

Almost surely, 2^{31212201333113} is an apocalyptic number.

It is an amenable number.

31212201333113 is a deficient number, since it is larger than the sum of its proper divisors (200371435).

31212201333113 is a wasteful number, since it uses less digits than its factorization.

31212201333113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200371434.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31212201333113 its reverse (31133310221213), we get a palindrome (62345511554326).

The spelling of 31212201333113 in words is "thirty-one trillion, two hundred twelve billion, two hundred one million, three hundred thirty-three thousand, one hundred thirteen".