121111100222111 has 8 divisors (see below), whose sum is σ = 126376923479040. Its totient is φ = 115845287235832.

The previous prime is 121111100222059. The next prime is 121111100222131. The reversal of 121111100222111 is 111222001111121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121111100222111 - 2²² = 121111096027807 is a prime.

It is a super-2 number, since 2×121111100222111² (a number of 29 digits) contains 22 as substring.

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 121111100222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111100222131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30699866 + ... + 34419528.

It is an arithmetic number, because the mean of its divisors is an integer number (15797115434880).

Almost surely, 2^{121111100222111} is an apocalyptic number.

121111100222111 is a deficient number, since it is larger than the sum of its proper divisors (5265823256929).

121111100222111 is a wasteful number, since it uses less digits than its factorization.

121111100222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5135325.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121111100222111 its reverse (111222001111121), we get a palindrome (232333101333232).

The spelling of 121111100222111 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred million, two hundred twenty-two thousand, one hundred eleven".