21323021210223 has 16 divisors (see below), whose sum is σ = 28492111272960. Its totient is φ = 14184668246144.

The previous prime is 21323021210221. The next prime is 21323021210243. The reversal of 21323021210223 is 32201212032312.

It is a cyclic number.

It is not a de Polignac number, because 21323021210223 - 2¹ = 21323021210221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323021210193 and 21323021210202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323021210221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667386 + ... + 6564407.

It is an arithmetic number, because the mean of its divisors is an integer number (1780756954560).

Almost surely, 2^{21323021210223} is an apocalyptic number.

21323021210223 is a deficient number, since it is larger than the sum of its proper divisors (7169090062737).

21323021210223 is a wasteful number, since it uses less digits than its factorization.

21323021210223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7233918.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21323021210223 its reverse (32201212032312), we get a palindrome (53524233242535).

The spelling of 21323021210223 in words is "twenty-one trillion, three hundred twenty-three billion, twenty-one million, two hundred ten thousand, two hundred twenty-three".