121158780 has 48 divisors (see below), whose sum is σ = 344319360. Its totient is φ = 31825728.

The previous prime is 121158767. The next prime is 121158787. The reversal of 121158780 is 87851121.

121158780 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121158787) 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, 11050 + ... + 19089.

It is an arithmetic number, because the mean of its divisors is an integer number (7173320).

Almost surely, 2^121158780 is an apocalyptic number.

121158780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121158780 is an abundant number, since it is smaller than the sum of its proper divisors (223160580).

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

121158780 is a wasteful number, since it uses less digits than its factorization.

121158780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30218 (or 30216 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 121158780 is about 11007.2149065965. The cubic root of 121158780 is about 494.8249968038.

The spelling of 121158780 in words is "one hundred twenty-one million, one hundred fifty-eight thousand, seven hundred eighty".