21021000210223 has 8 divisors (see below), whose sum is σ = 23829473922800. Its totient is φ = 18382737025728.

The previous prime is 21021000210167. The next prime is 21021000210233. The reversal of 21021000210223 is 32201200012012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021000210223 - 2³⁷ = 20883561256751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021000210197 and 21021000210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021000210233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42552631758 + ... + 42552632251.

It is an arithmetic number, because the mean of its divisors is an integer number (2978684240350).

Almost surely, 2^{21021000210223} is an apocalyptic number.

21021000210223 is a deficient number, since it is larger than the sum of its proper divisors (2808473712577).

21021000210223 is a wasteful number, since it uses less digits than its factorization.

21021000210223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85105264041.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021000210223 its reverse (32201200012012), we get a palindrome (53222200222235).

The spelling of 21021000210223 in words is "twenty-one trillion, twenty-one billion, two hundred ten thousand, two hundred twenty-three".