111220101212001 has 16 divisors (see below), whose sum is σ = 150333010430400. Its totient is φ = 73133015122368.

The previous prime is 111220101211981. The next prime is 111220101212083. The reversal of 111220101212001 is 100212101022111.

It is a happy number.

It is not a de Polignac number, because 111220101212001 - 2⁶ = 111220101211937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111220101012001) 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, 756433186 + ... + 756580203.

It is an arithmetic number, because the mean of its divisors is an integer number (9395813151900).

Almost surely, 2^{111220101212001} is an apocalyptic number.

It is an amenable number.

111220101212001 is a deficient number, since it is larger than the sum of its proper divisors (39112909218399).

111220101212001 is a wasteful number, since it uses less digits than its factorization.

111220101212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513013728.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111220101212001 its reverse (100212101022111), we get a palindrome (211432202234112).

The spelling of 111220101212001 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred one million, two hundred twelve thousand, one".