121809880080 has 1200 divisors, whose sum is σ = 528120394560. Its totient is φ = 25866086400.

The previous prime is 121809879973. The next prime is 121809880109. The reversal of 121809880080 is 80088908121.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 368005515 + ... + 368005845.

Almost surely, 2^121809880080 is an apocalyptic number.

121809880080 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 121809880080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264060197280).

121809880080 is an abundant number, since it is smaller than the sum of its proper divisors (406310514480).

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

121809880080 is a wasteful number, since it uses less digits than its factorization.

121809880080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 121809880080 in words is "one hundred twenty-one billion, eight hundred nine million, eight hundred eighty thousand, eighty".