121220330 has 32 divisors (see below), whose sum is σ = 272039040. Its totient is φ = 37782720.

The previous prime is 121220321. The next prime is 121220339. The reversal of 121220330 is 33022121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121220321) and next prime (121220339).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (121220339) 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, 77945 + ... + 79484.

It is an arithmetic number, because the mean of its divisors is an integer number (8501220).

Almost surely, 2^121220330 is an apocalyptic number.

121220330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220330 is an abundant number, since it is smaller than the sum of its proper divisors (150818710).

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

121220330 is a wasteful number, since it uses less digits than its factorization.

121220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157454.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121220330 is about 11010.0104450450. The cubic root of 121220330 is about 494.9087748087.

Adding to 121220330 its reverse (33022121), we get a palindrome (154242451).

The spelling of 121220330 in words is "one hundred twenty-one million, two hundred twenty thousand, three hundred thirty".