121101222100121 has 4 divisors (see below), whose sum is σ = 125277126310500. Its totient is φ = 116925317889744.

The previous prime is 121101222100037. The next prime is 121101222100123. The reversal of 121101222100121 is 121001222101121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98180453046025 + 22920769054096 = 9908605^2 + 4787564^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101222100121 - 2¹⁰ = 121101222099097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121101222100121.

It is not an unprimeable number, because it can be changed into a prime (121101222100123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087952105146 + ... + 2087952105203.

It is an arithmetic number, because the mean of its divisors is an integer number (31319281577625).

Almost surely, 2^{121101222100121} is an apocalyptic number.

It is an amenable number.

121101222100121 is a deficient number, since it is larger than the sum of its proper divisors (4175904210379).

121101222100121 is an equidigital number, since it uses as much as digits as its factorization.

121101222100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175904210378.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121101222100121 its reverse (121001222101121), we get a palindrome (242102444201242).

The spelling of 121101222100121 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".