21121646330 has 16 divisors (see below), whose sum is σ = 39245382144. Its totient is φ = 8176121040.

The previous prime is 21121646323. The next prime is 21121646347. The reversal of 21121646330 is 3364612112.

It is a super-2 number, since 2×21121646330² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21121646293 and 21121646302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34066862 + ... + 34067481.

It is an arithmetic number, because the mean of its divisors is an integer number (2452836384).

Almost surely, 2^21121646330 is an apocalyptic number.

21121646330 is a deficient number, since it is larger than the sum of its proper divisors (18123735814).

21121646330 is a wasteful number, since it uses less digits than its factorization.

21121646330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68134381.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21121646330 in words is "twenty-one billion, one hundred twenty-one million, six hundred forty-six thousand, three hundred thirty".