121203719161 has 12 divisors (see below), whose sum is σ = 141410474868. Its totient is φ = 103580612352.

The previous prime is 121203719113. The next prime is 121203719167. The reversal of 121203719161 is 161917302121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37847367936 + 83356351225 = 194544^2 + 288715^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121203719161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121203719167) 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 11 ways as a sum of consecutive naturals, for example, 3653436 + ... + 3686461.

It is an arithmetic number, because the mean of its divisors is an integer number (11784206239).

Almost surely, 2^121203719161 is an apocalyptic number.

It is an amenable number.

121203719161 is a deficient number, since it is larger than the sum of its proper divisors (20206755707).

121203719161 is an equidigital number, since it uses as much as digits as its factorization.

121203719161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7340248 (or 7340241 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 121203719161 in words is "one hundred twenty-one billion, two hundred three million, seven hundred nineteen thousand, one hundred sixty-one".