201331001213 has 4 divisors (see below), whose sum is σ = 201334071708. Its totient is φ = 201327930720.

The previous prime is 201331001203. The next prime is 201331001243. The reversal of 201331001213 is 312100133102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312100133102 = 2 ⋅156050066551.

It can be written as a sum of positive squares in 2 ways, for example, as 81134964964 + 120196036249 = 284842^2 + 346693^2 .

It is a cyclic number.

It is not a de Polignac number, because 201331001213 - 2¹² = 201330997117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201331001191 and 201331001200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201331001203) 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, 1434698 + ... + 1568763.

It is an arithmetic number, because the mean of its divisors is an integer number (50333517927).

Almost surely, 2^201331001213 is an apocalyptic number.

It is an amenable number.

201331001213 is a deficient number, since it is larger than the sum of its proper divisors (3070495).

201331001213 is an equidigital number, since it uses as much as digits as its factorization.

201331001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070494.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 201331001213 its reverse (312100133102), we get a palindrome (513431134315).

The spelling of 201331001213 in words is "two hundred one billion, three hundred thirty-one million, one thousand, two hundred thirteen".