121866693354 has 96 divisors (see below), whose sum is σ = 303431192064. Its totient is φ = 34627357440.

The previous prime is 121866693349. The next prime is 121866693373. The reversal of 121866693354 is 453396668121.

It is a self number, because there is not a number n which added to its sum of digits gives 121866693354.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18177567 + ... + 18184269.

It is an arithmetic number, because the mean of its divisors is an integer number (3160741584).

Almost surely, 2^121866693354 is an apocalyptic number.

121866693354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121866693354, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151715596032).

121866693354 is an abundant number, since it is smaller than the sum of its proper divisors (181564498710).

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

121866693354 is a wasteful number, since it uses less digits than its factorization.

121866693354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492 (or 7489 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 121866693354 in words is "one hundred twenty-one billion, eight hundred sixty-six million, six hundred ninety-three thousand, three hundred fifty-four".