121111216127 has 16 divisors (see below), whose sum is σ = 145121829120. Its totient is φ = 99771249600.

The previous prime is 121111216123. The next prime is 121111216147. The reversal of 121111216127 is 721612111121.

It is not a de Polignac number, because 121111216127 - 2² = 121111216123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111216096 and 121111216105.

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 15 ways as a sum of consecutive naturals, for example, 12592574 + ... + 12602187.

It is an arithmetic number, because the mean of its divisors is an integer number (9070114320).

Almost surely, 2^121111216127 is an apocalyptic number.

121111216127 is a deficient number, since it is larger than the sum of its proper divisors (24010612993).

121111216127 is a wasteful number, since it uses less digits than its factorization.

121111216127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25194814.

The product of its digits is 336, while the sum is 26.

Adding to 121111216127 its reverse (721612111121), we get a palindrome (842723327248).

The spelling of 121111216127 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred sixteen thousand, one hundred twenty-seven".