121200530 has 64 divisors (see below), whose sum is σ = 247750272. Its totient is φ = 42301440.

The previous prime is 121200517. The next prime is 121200539. The reversal of 121200530 is 35002121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121200539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394637 + ... + 394943.

It is an arithmetic number, because the mean of its divisors is an integer number (3871098).

Almost surely, 2^121200530 is an apocalyptic number.

121200530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121200530 is an abundant number, since it is smaller than the sum of its proper divisors (126549742).

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

121200530 is a wasteful number, since it uses less digits than its factorization.

121200530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 121200530 is about 11009.1112266159. Note that the first 3 decimals coincide. The cubic root of 121200530 is about 494.8818273836.

Adding to 121200530 its reverse (35002121), we get a palindrome (156202651).

The spelling of 121200530 in words is "one hundred twenty-one million, two hundred thousand, five hundred thirty".