111012221001 has 16 divisors (see below), whose sum is σ = 163071062208. Its totient is φ = 66613992000.

The previous prime is 111012220993. The next prime is 111012221011. The reversal of 111012221001 is 100122210111.

It is not a de Polignac number, because 111012221001 - 2³ = 111012220993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111012221011) 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, 16650166 + ... + 16656831.

It is an arithmetic number, because the mean of its divisors is an integer number (10191941388).

Almost surely, 2^111012221001 is an apocalyptic number.

111012221001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111012221001 is a deficient number, since it is larger than the sum of its proper divisors (52058841207).

111012221001 is a wasteful number, since it uses less digits than its factorization.

111012221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33307112.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111012221001 its reverse (100122210111), we get a palindrome (211134431112).

The spelling of 111012221001 in words is "one hundred eleven billion, twelve million, two hundred twenty-one thousand, one".