21121012330223 has 16 divisors (see below), whose sum is σ = 23276708384160. Its totient is φ = 19041253023744.

The previous prime is 21121012330211. The next prime is 21121012330273. The reversal of 21121012330223 is 32203321012112.

It is a cyclic number.

It is not a de Polignac number, because 21121012330223 - 2²² = 21121008135919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121012330273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4778015 + ... + 8066687.

It is an arithmetic number, because the mean of its divisors is an integer number (1454794274010).

Almost surely, 2^{21121012330223} is an apocalyptic number.

21121012330223 is a deficient number, since it is larger than the sum of its proper divisors (2155696053937).

21121012330223 is a wasteful number, since it uses less digits than its factorization.

21121012330223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300218.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21121012330223 its reverse (32203321012112), we get a palindrome (53324333342335).

The spelling of 21121012330223 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, three hundred thirty thousand, two hundred twenty-three".