111220021001 has 8 divisors (see below), whose sum is σ = 116134072704. Its totient is φ = 106312502560.

The previous prime is 111220020943. The next prime is 111220021021. The reversal of 111220021001 is 100120022111.

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

It is not a de Polignac number, because 111220021001 - 2⁶ = 111220020937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111220021021) 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, 1598501 + ... + 1666626.

It is an arithmetic number, because the mean of its divisors is an integer number (14516759088).

Almost surely, 2^111220021001 is an apocalyptic number.

It is an amenable number.

111220021001 is a deficient number, since it is larger than the sum of its proper divisors (4914051703).

111220021001 is a wasteful number, since it uses less digits than its factorization.

111220021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266631.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111220021001 its reverse (100120022111), we get a palindrome (211340043112).

The spelling of 111220021001 in words is "one hundred eleven billion, two hundred twenty million, twenty-one thousand, one".