121621330 has 8 divisors (see below), whose sum is σ = 218918412. Its totient is φ = 48648528.

The previous prime is 121621319. The next prime is 121621333. The reversal of 121621330 is 33126121.

It can be written as a sum of positive squares in 2 ways, for example, as 109181601 + 12439729 = 10449^2 + 3527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 121621298 and 121621307.

It is not an unprimeable number, because it can be changed into a prime (121621333) 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 3 ways as a sum of consecutive naturals, for example, 6081057 + ... + 6081076.

Almost surely, 2^121621330 is an apocalyptic number.

121621330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121621330 is a deficient number, since it is larger than the sum of its proper divisors (97297082).

121621330 is a wasteful number, since it uses less digits than its factorization.

121621330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162140.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 121621330 is about 11028.2061097896. The cubic root of 121621330 is about 495.4538978498.

Adding to 121621330 its reverse (33126121), we get a palindrome (154747451).

The spelling of 121621330 in words is "one hundred twenty-one million, six hundred twenty-one thousand, three hundred thirty".