111021221111101 has 24 divisors (see below), whose sum is σ = 130744711181880. Its totient is φ = 93988492416000.

The previous prime is 111021221111089. The next prime is 111021221111111. The reversal of 111021221111101 is 101111122120111.

It can be written as a sum of positive squares in 4 ways, for example, as 45121716252900 + 65899504858201 = 6717270^2 + 8117851^2 .

It is a de Polignac number, because none of the positive numbers 2^k-111021221111101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021221111111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25400140 + ... + 29448421.

It is an arithmetic number, because the mean of its divisors is an integer number (5447696299245).

Almost surely, 2^{111021221111101} is an apocalyptic number.

It is an amenable number.

111021221111101 is a deficient number, since it is larger than the sum of its proper divisors (19723490070779).

111021221111101 is a wasteful number, since it uses less digits than its factorization.

111021221111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54849085 (or 54849078 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111021221111101 its reverse (101111122120111), we get a palindrome (212132343231212).

It can be divided in two parts, 111021 and 221111101, that added together give a palindrome (221222122).

The spelling of 111021221111101 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred one".