111221121010011 has 16 divisors (see below), whose sum is σ = 148503203616768. Its totient is φ = 74043232243200.

The previous prime is 111221121009991. The next prime is 111221121010033. The reversal of 111221121010011 is 110010121122111.

It is not a de Polignac number, because 111221121010011 - 2¹¹ = 111221121007963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111221121010061) 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, 74705851 + ... + 76180091.

It is an arithmetic number, because the mean of its divisors is an integer number (9281450226048).

Almost surely, 2^{111221121010011} is an apocalyptic number.

111221121010011 is a deficient number, since it is larger than the sum of its proper divisors (37282082606757).

111221121010011 is a wasteful number, since it uses less digits than its factorization.

111221121010011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509562.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111221121010011 its reverse (110010121122111), we get a palindrome (221231242132122).

The spelling of 111221121010011 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, ten thousand, eleven".