121232011320121 has 12 divisors (see below), whose sum is σ = 134476726664700. Its totient is φ = 109177045835520.

The previous prime is 121232011320047. The next prime is 121232011320157. The reversal of 121232011320121 is 121023110232121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 66819834435600 + 54412176884521 = 8174340^2 + 7376461^2 .

It is not a de Polignac number, because 121232011320121 - 2⁹ = 121232011319609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121232011320092 and 121232011320101.

It is not an unprimeable number, because it can be changed into a prime (121232011321121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8748153796 + ... + 8748167653.

It is an arithmetic number, because the mean of its divisors is an integer number (11206393888725).

Almost surely, 2^{121232011320121} is an apocalyptic number.

It is an amenable number.

121232011320121 is a deficient number, since it is larger than the sum of its proper divisors (13244715344579).

121232011320121 is a wasteful number, since it uses less digits than its factorization.

121232011320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17496321516 (or 17496321503 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121232011320121 its reverse (121023110232121), we get a palindrome (242255121552242).

The spelling of 121232011320121 in words is "one hundred twenty-one trillion, two hundred thirty-two billion, eleven million, three hundred twenty thousand, one hundred twenty-one".