121111110201 has 16 divisors (see below), whose sum is σ = 171194978304. Its totient is φ = 75895912704.

The previous prime is 121111110193. The next prime is 121111110223. The reversal of 121111110201 is 102011111121.

It is not a de Polignac number, because 121111110201 - 2³ = 121111110193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111110101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449145 + ... + 1530438.

It is an arithmetic number, because the mean of its divisors is an integer number (10699686144).

Almost surely, 2^121111110201 is an apocalyptic number.

It is an amenable number.

121111110201 is a deficient number, since it is larger than the sum of its proper divisors (50083868103).

121111110201 is a wasteful number, since it uses less digits than its factorization.

121111110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980400.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121111110201 its reverse (102011111121), we get a palindrome (223122221322).

The spelling of 121111110201 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, two hundred one".