111101201220001 has 4 divisors (see below), whose sum is σ = 112922532387604. Its totient is φ = 109279870052400.

The previous prime is 111101201219989. The next prime is 111101201220013. The reversal of 111101201220001 is 100022102101111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (111101201219989) and next prime (111101201220013).

It can be written as a sum of positive squares in 2 ways, for example, as 4706122809600 + 106395078410401 = 2169360^2 + 10314799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111101201220001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111101201220091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910665583710 + ... + 910665583831.

It is an arithmetic number, because the mean of its divisors is an integer number (28230633096901).

Almost surely, 2^{111101201220001} is an apocalyptic number.

It is an amenable number.

111101201220001 is a deficient number, since it is larger than the sum of its proper divisors (1821331167603).

111101201220001 is an equidigital number, since it uses as much as digits as its factorization.

111101201220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821331167602.

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

Adding to 111101201220001 its reverse (100022102101111), we get a palindrome (211123303321112).

The spelling of 111101201220001 in words is "one hundred eleven trillion, one hundred one billion, two hundred one million, two hundred twenty thousand, one".