1111122100221 has 48 divisors (see below), whose sum is σ = 1771816209984. Its totient is φ = 617115614976.

The previous prime is 1111122100201. The next prime is 1111122100223. The reversal of 1111122100221 is 1220012211111.

It is a happy number.

It is not a de Polignac number, because 1111122100221 - 2⁶ = 1111122100157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111122100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111122100223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5076186 + ... + 5290548.

It is an arithmetic number, because the mean of its divisors is an integer number (36912837708).

Almost surely, 2^{1111122100221} is an apocalyptic number.

It is an amenable number.

1111122100221 is a deficient number, since it is larger than the sum of its proper divisors (660694109763).

1111122100221 is a wasteful number, since it uses less digits than its factorization.

1111122100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215370 (or 215363 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1111122100221 its reverse (1220012211111), we get a palindrome (2331134311332).

The spelling of 1111122100221 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred thousand, two hundred twenty-one".