121451551560 has 96 divisors (see below), whose sum is σ = 395143515000. Its totient is φ = 32352129024.

The previous prime is 121451551553. The next prime is 121451551601. The reversal of 121451551560 is 65155154121.

121451551560 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 51 + 551 + 56 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60702118884 + 60749432676 = 246378^2 + 246474^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152866 + ... + 516014.

Almost surely, 2^121451551560 is an apocalyptic number.

121451551560 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 121451551560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197571757500).

121451551560 is an abundant number, since it is smaller than the sum of its proper divisors (273691963440).

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

121451551560 is a wasteful number, since it uses less digits than its factorization.

121451551560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364095 (or 364088 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

The spelling of 121451551560 in words is "one hundred twenty-one billion, four hundred fifty-one million, five hundred fifty-one thousand, five hundred sixty".