121111102002111 has 16 divisors (see below), whose sum is σ = 173903319891840. Its totient is φ = 74529823609440.

The previous prime is 121111102002101. The next prime is 121111102002161. The reversal of 121111102002111 is 111200201111121.

It is not a de Polignac number, because 121111102002111 - 2²² = 121111097807807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111102002101) 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, 59274556 + ... + 61283726.

It is an arithmetic number, because the mean of its divisors is an integer number (10868957493240).

Almost surely, 2^{121111102002111} is an apocalyptic number.

121111102002111 is a deficient number, since it is larger than the sum of its proper divisors (52792217889729).

121111102002111 is a wasteful number, since it uses less digits than its factorization.

121111102002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554806.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121111102002111 its reverse (111200201111121), we get a palindrome (232311303113232).

The spelling of 121111102002111 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, two thousand, one hundred eleven".