16121330 has 8 divisors (see below), whose sum is σ = 29018412. Its totient is φ = 6448528.

The previous prime is 16121311. The next prime is 16121341. The reversal of 16121330 is 3312161.

It can be written as a sum of positive squares in 2 ways, for example, as 16104169 + 17161 = 4013^2 + 131^2 .

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 = 16121299 and 16121308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 806057 + ... + 806076.

Almost surely, 2^16121330 is an apocalyptic number.

16121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16121330 is a deficient number, since it is larger than the sum of its proper divisors (12897082).

16121330 is a wasteful number, since it uses less digits than its factorization.

16121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612140.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 16121330 is about 4015.1376066083. The cubic root of 16121330 is about 252.6195493099.

Adding to 16121330 its reverse (3312161), we get a palindrome (19433491).

The spelling of 16121330 in words is "sixteen million, one hundred twenty-one thousand, three hundred thirty".