111221001010101 has 16 divisors (see below), whose sum is σ = 152321327573184. Its totient is φ = 72134496215424.

The previous prime is 111221001010087. The next prime is 111221001010121. The reversal of 111221001010101 is 101010100122111.

It is not a de Polignac number, because 111221001010101 - 2²⁹ = 111220464139189 is a prime.

It is a super-2 number, since 2×111221001010101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221001010121) 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, 60590160 + ... + 62398793.

It is an arithmetic number, because the mean of its divisors is an integer number (9520082973324).

Almost surely, 2^{111221001010101} is an apocalyptic number.

It is an amenable number.

111221001010101 is a deficient number, since it is larger than the sum of its proper divisors (41100326563083).

111221001010101 is a wasteful number, since it uses less digits than its factorization.

111221001010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122997140.

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

Adding to 111221001010101 its reverse (101010100122111), we get a palindrome (212231101132212).

The spelling of 111221001010101 in words is "one hundred eleven trillion, two hundred twenty-one billion, one million, ten thousand, one hundred one".