121220424330 has 32 divisors (see below), whose sum is σ = 291294105984. Its totient is φ = 32284881216.

The previous prime is 121220424319. The next prime is 121220424337. The reversal of 121220424330 is 33424022121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121220424330.

It is not an unprimeable number, because it can be changed into a prime (121220424337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2511022 + ... + 2558841.

It is an arithmetic number, because the mean of its divisors is an integer number (9102940812).

Almost surely, 2^121220424330 is an apocalyptic number.

121220424330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220424330 is an abundant number, since it is smaller than the sum of its proper divisors (170073681654).

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

121220424330 is a wasteful number, since it uses less digits than its factorization.

121220424330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070670.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 121220424330 its reverse (33424022121), we get a palindrome (154644446451).

The spelling of 121220424330 in words is "one hundred twenty-one billion, two hundred twenty million, four hundred twenty-four thousand, three hundred thirty".