121101211100121 has 16 divisors (see below), whose sum is σ = 184542424547328. Its totient is φ = 69197974909200.

The previous prime is 121101211100117. The next prime is 121101211100123. The reversal of 121101211100121 is 121001112101121.

It is not a de Polignac number, because 121101211100121 - 2² = 121101211100117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121101211100121.

It is not an unprimeable number, because it can be changed into a prime (121101211100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112666875 + ... + 113736656.

It is an arithmetic number, because the mean of its divisors is an integer number (11533901534208).

Almost surely, 2^{121101211100121} is an apocalyptic number.

It is an amenable number.

121101211100121 is a deficient number, since it is larger than the sum of its proper divisors (63441213447207).

121101211100121 is a wasteful number, since it uses less digits than its factorization.

121101211100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226429012.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121101211100121 its reverse (121001112101121), we get a palindrome (242102323201242).

The spelling of 121101211100121 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".