1111221121101 has 128 divisors (see below), whose sum is σ = 1956055965696. Its totient is φ = 544998896640.

The previous prime is 1111221121099. The next prime is 1111221121163. The reversal of 1111221121101 is 1011211221111.

It is not a de Polignac number, because 1111221121101 - 2¹ = 1111221121099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111223121101) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 448614475 + ... + 448616951.

It is an arithmetic number, because the mean of its divisors is an integer number (15281687232).

Almost surely, 2^{1111221121101} is an apocalyptic number.

It is an amenable number.

1111221121101 is a deficient number, since it is larger than the sum of its proper divisors (844834844595).

1111221121101 is a wasteful number, since it uses less digits than its factorization.

1111221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491.

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

Adding to 1111221121101 its reverse (1011211221111), we get a palindrome (2122432342212).

The spelling of 1111221121101 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".