111221111000001 has 8 divisors (see below), whose sum is σ = 152302782630784. Its totient is φ = 72143423351280.

The previous prime is 111221110999993. The next prime is 111221111000011. The reversal of 111221111000001 is 100000111122111.

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

It is not a de Polignac number, because 111221111000001 - 2³ = 111221110999993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221111000011) 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, 500995995385 + ... + 500995995606.

It is an arithmetic number, because the mean of its divisors is an integer number (19037847828848).

Almost surely, 2^{111221111000001} is an apocalyptic number.

It is an amenable number.

111221111000001 is a deficient number, since it is larger than the sum of its proper divisors (41081671630783).

111221111000001 is a wasteful number, since it uses less digits than its factorization.

111221111000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001991991031.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111221111000001 its reverse (100000111122111), we get a palindrome (211221222122112).

It can be divided in two parts, 11122111 and 1000001, that multiplied together give a palindrome (11122122122111).

The spelling of 111221111000001 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, one", and thus it is an aban number.