121000878 has 56 divisors (see below), whose sum is σ = 279606888. Its totient is φ = 39226032.

The previous prime is 121000877. The next prime is 121000879. The reversal of 121000878 is 878000121.

It is an interprime number because it is at equal distance from previous prime (121000877) and next prime (121000879).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000877) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 52825 + ... + 55067.

Almost surely, 2^121000878 is an apocalyptic number.

121000878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121000878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139803444).

121000878 is an abundant number, since it is smaller than the sum of its proper divisors (158606010).

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

121000878 is an equidigital number, since it uses as much as digits as its factorization.

121000878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 121000878 is about 11000.0399090185. The cubic root of 121000878 is about 494.6099406484.

Adding to 121000878 its reverse (878000121), we get a palindrome (999000999).

The spelling of 121000878 in words is "one hundred twenty-one million, eight hundred seventy-eight", and thus it is an aban number.