121123539516997 has 4 divisors (see below), whose sum is σ = 121124793727116. Its totient is φ = 121122285306880.

The previous prime is 121123539516989. The next prime is 121123539517031. The reversal of 121123539516997 is 799615935321121.

It is a Cunningham number, because it is equal to 11005614²+1.

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 1103604876676 + 120019934640321 = 1050526^2 + 10955361^2 .

It is a cyclic number.

It is not a de Polignac number, because 121123539516997 - 2³ = 121123539516989 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 (121123539516937) 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, 626960188 + ... + 627153349.

It is an arithmetic number, because the mean of its divisors is an integer number (30281198431779).

Almost surely, 2^{121123539516997} is an apocalyptic number.

It is an amenable number.

121123539516997 is a deficient number, since it is larger than the sum of its proper divisors (1254210119).

121123539516997 is an equidigital number, since it uses as much as digits as its factorization.

121123539516997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254210118.

The product of its digits is 27556200, while the sum is 64.

The spelling of 121123539516997 in words is "one hundred twenty-one trillion, one hundred twenty-three billion, five hundred thirty-nine million, five hundred sixteen thousand, nine hundred ninety-seven".