111100220121001 has 8 divisors (see below), whose sum is σ = 115976650518144. Its totient is φ = 106227621894240.

The previous prime is 111100220120993. The next prime is 111100220121043. The reversal of 111100220121001 is 100121022001111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111100220121001 - 2³ = 111100220120993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111100220121101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957983341 + ... + 958099306.

It is an arithmetic number, because the mean of its divisors is an integer number (14497081314768).

Almost surely, 2^{111100220121001} is an apocalyptic number.

It is an amenable number.

111100220121001 is a deficient number, since it is larger than the sum of its proper divisors (4876430397143).

111100220121001 is a wasteful number, since it uses less digits than its factorization.

111100220121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916085191.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111100220121001 its reverse (100121022001111), we get a palindrome (211221242122112).

The spelling of 111100220121001 in words is "one hundred eleven trillion, one hundred billion, two hundred twenty million, one hundred twenty-one thousand, one".