21121221113330 has 32 divisors (see below), whose sum is σ = 40954336915968. Its totient is φ = 7796383358400.

The previous prime is 21121221113287. The next prime is 21121221113347. The reversal of 21121221113330 is 3331112212112.

It is a happy number.

It is a super-2 number, since 2×21121221113330² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121221113296 and 21121221113305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22680986 + ... + 23593845.

It is an arithmetic number, because the mean of its divisors is an integer number (1279823028624).

Almost surely, 2^{21121221113330} is an apocalyptic number.

21121221113330 is a deficient number, since it is larger than the sum of its proper divisors (19833115802638).

21121221113330 is a wasteful number, since it uses less digits than its factorization.

21121221113330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46278362.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21121221113330 its reverse (3331112212112), we get a palindrome (24452333325442).

The spelling of 21121221113330 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, three hundred thirty".