121354271280 has 400 divisors, whose sum is σ = 461580055200. Its totient is φ = 29305221120.

The previous prime is 121354271257. The next prime is 121354271287. The reversal of 121354271280 is 82172453121.

121354271280 is a `hidden beast` number, since 1 + 2 + 1 + 354 + 27 + 1 + 280 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121354271287) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 19171156 + ... + 19177484.

It is an arithmetic number, because the mean of its divisors is an integer number (1153950138).

Almost surely, 2^121354271280 is an apocalyptic number.

121354271280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121354271280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230790027600).

121354271280 is an abundant number, since it is smaller than the sum of its proper divisors (340225783920).

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

121354271280 is a wasteful number, since it uses less digits than its factorization.

121354271280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634 (or 6619 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 121354271280 in words is "one hundred twenty-one billion, three hundred fifty-four million, two hundred seventy-one thousand, two hundred eighty".