111002120011221 has 16 divisors (see below), whose sum is σ = 150851891266944. Its totient is φ = 72590383724544.

The previous prime is 111002120011177. The next prime is 111002120011253. The reversal of 111002120011221 is 122110021200111.

It is a happy number.

It is not a de Polignac number, because 111002120011221 - 2¹⁸ = 111002119749077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111002120011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111002120011271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1687801561 + ... + 1687867326.

It is an arithmetic number, because the mean of its divisors is an integer number (9428243204184).

Almost surely, 2^{111002120011221} is an apocalyptic number.

It is an amenable number.

111002120011221 is a deficient number, since it is larger than the sum of its proper divisors (39849771255723).

111002120011221 is a wasteful number, since it uses less digits than its factorization.

111002120011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375669100.

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

Adding to 111002120011221 its reverse (122110021200111), we get a palindrome (233112141211332).

The spelling of 111002120011221 in words is "one hundred eleven trillion, two billion, one hundred twenty million, eleven thousand, two hundred twenty-one".