111202211221 has 8 divisors (see below), whose sum is σ = 117061005600. Its totient is φ = 105344021520.

The previous prime is 111202211213. The next prime is 111202211243. The reversal of 111202211221 is 122112202111.

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 111202211221 - 2³ = 111202211213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111202211195 and 111202211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202211521) 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, 254226 + ... + 535756.

It is an arithmetic number, because the mean of its divisors is an integer number (14632625700).

Almost surely, 2^111202211221 is an apocalyptic number.

It is an amenable number.

111202211221 is a deficient number, since it is larger than the sum of its proper divisors (5858794379).

111202211221 is a wasteful number, since it uses less digits than its factorization.

111202211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302339.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111202211221 its reverse (122112202111), we get a palindrome (233314413332).

The spelling of 111202211221 in words is "one hundred eleven billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".