111220101022001 has 4 divisors (see below), whose sum is σ = 111220123282212. Its totient is φ = 111220078761792.

The previous prime is 111220101021977. The next prime is 111220101022013. The reversal of 111220101022001 is 100220101022111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38442976057600 + 72777124964401 = 6200240^2 + 8530951^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220101022001 - 2²⁶ = 111220033913137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220101022081) 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, 228101 + ... + 14916173.

It is an arithmetic number, because the mean of its divisors is an integer number (27805030820553).

Almost surely, 2^{111220101022001} is an apocalyptic number.

It is an amenable number.

111220101022001 is a deficient number, since it is larger than the sum of its proper divisors (22260211).

111220101022001 is an equidigital number, since it uses as much as digits as its factorization.

111220101022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22260210.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111220101022001 its reverse (100220101022111), we get a palindrome (211440202044112).

The spelling of 111220101022001 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred one million, twenty-two thousand, one".