201211112023213 has 4 divisors (see below), whose sum is σ = 208149426230940. Its totient is φ = 194272797815488.

The previous prime is 201211112023189. The next prime is 201211112023249. The reversal of 201211112023213 is 312320211112102.

It is a happy number.

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 85113116108329 + 116097995914884 = 9225677^2 + 10774878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211112023213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211112053213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469157103820 + ... + 3469157103877.

It is an arithmetic number, because the mean of its divisors is an integer number (52037356557735).

Almost surely, 2^{201211112023213} is an apocalyptic number.

It is an amenable number.

201211112023213 is a deficient number, since it is larger than the sum of its proper divisors (6938314207727).

201211112023213 is an equidigital number, since it uses as much as digits as its factorization.

201211112023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938314207726.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 201211112023213 its reverse (312320211112102), we get a palindrome (513531323135315).

The spelling of 201211112023213 in words is "two hundred one trillion, two hundred eleven billion, one hundred twelve million, twenty-three thousand, two hundred thirteen".