111222010221 has 16 divisors (see below), whose sum is σ = 169563139200. Its totient is φ = 63524691648.

The previous prime is 111222010183. The next prime is 111222010253. The reversal of 111222010221 is 122010222111.

It is not a de Polignac number, because 111222010221 - 2²³ = 111213621613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111222010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222510221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236466 + ... + 1323363.

It is an arithmetic number, because the mean of its divisors is an integer number (10597696200).

Almost surely, 2^111222010221 is an apocalyptic number.

It is an amenable number.

111222010221 is a deficient number, since it is larger than the sum of its proper divisors (58341128979).

111222010221 is a wasteful number, since it uses less digits than its factorization.

111222010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561908.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111222010221 its reverse (122010222111), we get a palindrome (233232232332).

The spelling of 111222010221 in words is "one hundred eleven billion, two hundred twenty-two million, ten thousand, two hundred twenty-one".