121111322111 has 16 divisors (see below), whose sum is σ = 137962727616. Its totient is φ = 105469537536.

The previous prime is 121111322093. The next prime is 121111322117. The reversal of 121111322111 is 111223111121.

It is a cyclic number.

It is not a de Polignac number, because 121111322111 - 2²⁶ = 121044213247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121111322111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111322117) 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, 2752520 + ... + 2796173.

It is an arithmetic number, because the mean of its divisors is an integer number (8622670476).

Almost surely, 2^121111322111 is an apocalyptic number.

121111322111 is a deficient number, since it is larger than the sum of its proper divisors (16851405505).

121111322111 is a wasteful number, since it uses less digits than its factorization.

121111322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5548802.

The product of its digits is 24, while the sum is 17.

Adding to 121111322111 its reverse (111223111121), we get a palindrome (232334433232).

The spelling of 121111322111 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred twenty-two thousand, one hundred eleven".