121111222101 has 16 divisors (see below), whose sum is σ = 168117872064. Its totient is φ = 77482479744.

The previous prime is 121111222087. The next prime is 121111222117. The reversal of 121111222101 is 101222111121.

It is a happy number.

It is not a de Polignac number, because 121111222101 - 2¹⁷ = 121111091029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7465131 + ... + 7481336.

It is an arithmetic number, because the mean of its divisors is an integer number (10507367004).

Almost surely, 2^121111222101 is an apocalyptic number.

It is an amenable number.

121111222101 is a deficient number, since it is larger than the sum of its proper divisors (47006649963).

121111222101 is a wasteful number, since it uses less digits than its factorization.

121111222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14946580.

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

Adding to 121111222101 its reverse (101222111121), we get a palindrome (222333333222).

The spelling of 121111222101 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred one".