201111212013 has 4 divisors (see below), whose sum is σ = 268148282688. Its totient is φ = 134074141340.

The previous prime is 201111211999. The next prime is 201111212021. The reversal of 201111212013 is 310212111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201111212013 - 2¹² = 201111207917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201111211983 and 201111212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111212413) 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, 33518535333 + ... + 33518535338.

It is an arithmetic number, because the mean of its divisors is an integer number (67037070672).

Almost surely, 2^201111212013 is an apocalyptic number.

It is an amenable number.

201111212013 is a deficient number, since it is larger than the sum of its proper divisors (67037070675).

201111212013 is an equidigital number, since it uses as much as digits as its factorization.

201111212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67037070674.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 201111212013 its reverse (310212111102), we get a palindrome (511323323115).

The spelling of 201111212013 in words is "two hundred one billion, one hundred eleven million, two hundred twelve thousand, thirteen".