111000102121221 has 48 divisors (see below), whose sum is σ = 163448018446464. Its totient is φ = 66923595543168.

The previous prime is 111000102121219. The next prime is 111000102121241. The reversal of 111000102121221 is 122121201000111.

It is a happy number.

It is not a de Polignac number, because 111000102121221 - 2¹ = 111000102121219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111000102121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000102121211) 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, 24009121 + ... + 28256646.

It is an arithmetic number, because the mean of its divisors is an integer number (3405167050968).

Almost surely, 2^{111000102121221} is an apocalyptic number.

It is an amenable number.

111000102121221 is a deficient number, since it is larger than the sum of its proper divisors (52447916325243).

111000102121221 is a wasteful number, since it uses less digits than its factorization.

111000102121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52265898 (or 52265879 counting only the distinct ones).

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

Adding to 111000102121221 its reverse (122121201000111), we get a palindrome (233121303121332).

The spelling of 111000102121221 in words is "one hundred eleven trillion, one hundred two million, one hundred twenty-one thousand, two hundred twenty-one".