121825580208 has 80 divisors (see below), whose sum is σ = 319708346880. Its totient is φ = 39967619328.

The previous prime is 121825580203. The next prime is 121825580221. The reversal of 121825580208 is 802085528121.

It is a self number, because there is not a number n which added to its sum of digits gives 121825580208.

It is not an unprimeable number, because it can be changed into a prime (121825580203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151391 + ... + 1252737.

It is an arithmetic number, because the mean of its divisors is an integer number (3996354336).

Almost surely, 2^121825580208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121825580208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159854173440).

121825580208 is an abundant number, since it is smaller than the sum of its proper divisors (197882766672).

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

121825580208 is a wasteful number, since it uses less digits than its factorization.

121825580208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101754 (or 101748 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 42.

The spelling of 121825580208 in words is "one hundred twenty-one billion, eight hundred twenty-five million, five hundred eighty thousand, two hundred eight".