121111216126 has 16 divisors (see below), whose sum is σ = 182182469040. Its totient is φ = 60383957760.

The previous prime is 121111216123. The next prime is 121111216147. The reversal of 121111216126 is 621612111121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121111216126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121111216123) 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, 1003840 + ... + 1117996.

It is an arithmetic number, because the mean of its divisors is an integer number (11386404315).

Almost surely, 2^121111216126 is an apocalyptic number.

121111216126 is a deficient number, since it is larger than the sum of its proper divisors (61071252914).

121111216126 is a wasteful number, since it uses less digits than its factorization.

121111216126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115659.

The product of its digits is 288, while the sum is 25.

Adding to 121111216126 its reverse (621612111121), we get a palindrome (742723327247).

The spelling of 121111216126 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred sixteen thousand, one hundred twenty-six".