121201110121 has 16 divisors (see below), whose sum is σ = 150618866944. Its totient is φ = 94964353344.

The previous prime is 121201110089. The next prime is 121201110259. The reversal of 121201110121 is 121011102121.

It is a happy number.

It is not a de Polignac number, because 121201110121 - 2⁵ = 121201110089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (121201110521) 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, 6456066 + ... + 6474811.

It is an arithmetic number, because the mean of its divisors is an integer number (9413679184).

Almost surely, 2^121201110121 is an apocalyptic number.

It is an amenable number.

121201110121 is a deficient number, since it is larger than the sum of its proper divisors (29417756823).

121201110121 is a wasteful number, since it uses less digits than its factorization.

121201110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12931000.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121201110121 its reverse (121011102121), we get a palindrome (242212212242).

The spelling of 121201110121 in words is "one hundred twenty-one billion, two hundred one million, one hundred ten thousand, one hundred twenty-one".