121212330 has 16 divisors (see below), whose sum is σ = 290909664. Its totient is φ = 32323280.

The previous prime is 121212317. The next prime is 121212341. The reversal of 121212330 is 33212121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020176 + ... + 2020235.

It is an arithmetic number, because the mean of its divisors is an integer number (18181854).

Almost surely, 2^121212330 is an apocalyptic number.

121212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212330 is an abundant number, since it is smaller than the sum of its proper divisors (169697334).

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

121212330 is a wasteful number, since it uses less digits than its factorization.

121212330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040421.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121212330 is about 11009.6471333100. The cubic root of 121212330 is about 494.8978873135.

Adding to 121212330 its reverse (33212121), we get a palindrome (154424451).

The spelling of 121212330 in words is "one hundred twenty-one million, two hundred twelve thousand, three hundred thirty".