121388726706198 has 16 divisors (see below), whose sum is σ = 277459946757120. Its totient is φ = 34682493344616.

The previous prime is 121388726706179. The next prime is 121388726706217. The reversal of 121388726706198 is 891607627883121.

121388726706198 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121388726706179) and next prime (121388726706217).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445103889318 + ... + 1445103889401.

It is an arithmetic number, because the mean of its divisors is an integer number (17341246672320).

Almost surely, 2^{121388726706198} is an apocalyptic number.

121388726706198 is an abundant number, since it is smaller than the sum of its proper divisors (156071220050922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121388726706198 is a wasteful number, since it uses less digits than its factorization.

121388726706198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890207778731.

The product of its (nonzero) digits is 97542144, while the sum is 69.

The spelling of 121388726706198 in words is "one hundred twenty-one trillion, three hundred eighty-eight billion, seven hundred twenty-six million, seven hundred six thousand, one hundred ninety-eight".