111220100100001 has 32 divisors (see below), whose sum is σ = 119563952048640. Its totient is φ = 103215917376000.

The previous prime is 111220100099981. The next prime is 111220100100059. The reversal of 111220100100001 is 100001001022111.

It is not a de Polignac number, because 111220100100001 - 2²⁵ = 111220066545569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111220100100401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99044956 + ... + 100161586.

It is an arithmetic number, because the mean of its divisors is an integer number (3736373501520).

Almost surely, 2^{111220100100001} is an apocalyptic number.

It is an amenable number.

111220100100001 is a deficient number, since it is larger than the sum of its proper divisors (8343851948639).

111220100100001 is a wasteful number, since it uses less digits than its factorization.

111220100100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117617.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 111220100100001 its reverse (100001001022111), we get a palindrome (211221101122112).

The spelling of 111220100100001 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred million, one hundred thousand, one".