111205221213 has 8 divisors (see below), whose sum is σ = 151071244128. Its totient is φ = 72738006224.

The previous prime is 111205221187. The next prime is 111205221221. The reversal of 111205221213 is 312122502111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111205221213 - 2⁵ = 111205221181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111205221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111205221263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349701795 + ... + 349702112.

It is an arithmetic number, because the mean of its divisors is an integer number (18883905516).

Almost surely, 2^111205221213 is an apocalyptic number.

It is an amenable number.

111205221213 is a deficient number, since it is larger than the sum of its proper divisors (39866022915).

111205221213 is an equidigital number, since it uses as much as digits as its factorization.

111205221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699403963.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 111205221213 its reverse (312122502111), we get a palindrome (423327723324).

It can be divided in two parts, 1112052 and 21213, that added together give a triangular number (1133265 = T₁₅₀₅).

The spelling of 111205221213 in words is "one hundred eleven billion, two hundred five million, two hundred twenty-one thousand, two hundred thirteen".