121101222111 has 16 divisors (see below), whose sum is σ = 165842660064. Its totient is φ = 78547238784.

The previous prime is 121101222071. The next prime is 121101222149. The reversal of 121101222111 is 111222101121.

It is a happy number.

It is not a de Polignac number, because 121101222111 - 2⁹ = 121101221599 is a prime.

It is a super-3 number, since 3×121101222111³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101222181) 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, 2835165 + ... + 2877561.

It is an arithmetic number, because the mean of its divisors is an integer number (10365166254).

Almost surely, 2^121101222111 is an apocalyptic number.

121101222111 is a deficient number, since it is larger than the sum of its proper divisors (44741437953).

121101222111 is a wasteful number, since it uses less digits than its factorization.

121101222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68170.

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

Adding to 121101222111 its reverse (111222101121), we get a palindrome (232323323232).

The spelling of 121101222111 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, one hundred eleven".