213212112113111 has 4 divisors (see below), whose sum is σ = 213367401343992. Its totient is φ = 213056822882232.

The previous prime is 213212112113101. The next prime is 213212112113171. The reversal of 213212112113111 is 111311211212312.

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

It is a cyclic number.

It is not a de Polignac number, because 213212112113111 - 2²⁶ = 213212045004247 is a prime.

It is a super-3 number, since 3×213212112113111³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212112113101) 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, 77644613381 + ... + 77644616126.

It is an arithmetic number, because the mean of its divisors is an integer number (53341850335998).

Almost surely, 2^{213212112113111} is an apocalyptic number.

213212112113111 is a deficient number, since it is larger than the sum of its proper divisors (155289230881).

213212112113111 is a wasteful number, since it uses less digits than its factorization.

213212112113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155289230880.

The product of its digits is 144, while the sum is 23.

Adding to 213212112113111 its reverse (111311211212312), we get a palindrome (324523323325423).

The spelling of 213212112113111 in words is "two hundred thirteen trillion, two hundred twelve billion, one hundred twelve million, one hundred thirteen thousand, one hundred eleven".