121552049797 has 4 divisors (see below), whose sum is σ = 125743499820. Its totient is φ = 117360599776.

The previous prime is 121552049789. The next prime is 121552049821. The reversal of 121552049797 is 797940255121.

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 48279515076 + 73272534721 = 219726^2 + 270689^2 .

It is a cyclic number.

It is not a de Polignac number, because 121552049797 - 2³ = 121552049789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552049737) 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, 2095724968 + ... + 2095725025.

It is an arithmetic number, because the mean of its divisors is an integer number (31435874955).

Almost surely, 2^121552049797 is an apocalyptic number.

It is an amenable number.

121552049797 is a deficient number, since it is larger than the sum of its proper divisors (4191450023).

121552049797 is an equidigital number, since it uses as much as digits as its factorization.

121552049797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191450022.

The product of its (nonzero) digits is 1587600, while the sum is 52.

The spelling of 121552049797 in words is "one hundred twenty-one billion, five hundred fifty-two million, forty-nine thousand, seven hundred ninety-seven".