121274053336566 has 256 divisors, whose sum is σ = 293446389841920. Its totient is φ = 36904288227840.

The previous prime is 121274053336543. The next prime is 121274053336603. The reversal of 121274053336566 is 665633350472121.

121274053336566 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 7 + 40 + 5 + 3 + 3 + 36 + 566 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16874082025 + ... + 16874089211.

It is an arithmetic number, because the mean of its divisors is an integer number (1146274960320).

Almost surely, 2^{121274053336566} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121274053336566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146723194920960).

121274053336566 is an abundant number, since it is smaller than the sum of its proper divisors (172172336505354).

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

121274053336566 is a wasteful number, since it uses less digits than its factorization.

121274053336566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116 (or 8110 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 54.

The spelling of 121274053336566 in words is "one hundred twenty-one trillion, two hundred seventy-four billion, fifty-three million, three hundred thirty-six thousand, five hundred sixty-six".