111002112001221 has 16 divisors (see below), whose sum is σ = 169227278605824. Its totient is φ = 63399327095664.

The previous prime is 111002112001177. The next prime is 111002112001229. The reversal of 111002112001221 is 122100211200111.

It is a happy number.

It is not a de Polignac number, because 111002112001221 - 2¹⁹ = 111002111476933 is a prime.

It is a super-2 number, since 2×111002112001221² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111002112001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002112001229) 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, 1268754831 + ... + 1268842316.

It is an arithmetic number, because the mean of its divisors is an integer number (10576704912864).

Almost surely, 2^{111002112001221} is an apocalyptic number.

It is an amenable number.

111002112001221 is a deficient number, since it is larger than the sum of its proper divisors (58225166604603).

111002112001221 is a wasteful number, since it uses less digits than its factorization.

111002112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537599240.

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

Adding to 111002112001221 its reverse (122100211200111), we get a palindrome (233102323201332).

The spelling of 111002112001221 in words is "one hundred eleven trillion, two billion, one hundred twelve million, one thousand, two hundred twenty-one".