121873520160 has 672 divisors, whose sum is σ = 501654892032. Its totient is φ = 27388938240.

The previous prime is 121873520147. The next prime is 121873520177. The reversal of 121873520160 is 61025378121.

121873520160 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 73 + 520 + 1 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 49804057 + ... + 49806503.

It is an arithmetic number, because the mean of its divisors is an integer number (746510256).

Almost surely, 2^121873520160 is an apocalyptic number.

121873520160 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 121873520160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250827446016).

121873520160 is an abundant number, since it is smaller than the sum of its proper divisors (379781371872).

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

121873520160 is an equidigital number, since it uses as much as digits as its factorization.

121873520160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2525 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 121873520160 its reverse (61025378121), we get a palindrome (182898898281).

The spelling of 121873520160 in words is "one hundred twenty-one billion, eight hundred seventy-three million, five hundred twenty thousand, one hundred sixty".