121111100201 has 24 divisors (see below), whose sum is σ = 149996989440. Its totient is φ = 95748621696.

The previous prime is 121111100177. The next prime is 121111100203. The reversal of 121111100201 is 102001111121.

It is a de Polignac number, because none of the positive numbers 2^k-121111100201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121111100203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1485176 + ... + 1564598.

It is an arithmetic number, because the mean of its divisors is an integer number (6249874560).

Almost surely, 2^121111100201 is an apocalyptic number.

It is an amenable number.

121111100201 is a deficient number, since it is larger than the sum of its proper divisors (28885889239).

121111100201 is a wasteful number, since it uses less digits than its factorization.

121111100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80745 (or 80732 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121111100201 its reverse (102001111121), we get a palindrome (223112211322).

The spelling of 121111100201 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred one".