21021301120223 has 4 divisors (see below), whose sum is σ = 22257848244960. Its totient is φ = 19784753995488.

The previous prime is 21021301120213. The next prime is 21021301120247. The reversal of 21021301120223 is 32202110312012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21021301120223 - 2¹⁰ = 21021301119199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021301120195 and 21021301120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021301120213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618273562343 + ... + 618273562376.

It is an arithmetic number, because the mean of its divisors is an integer number (5564462061240).

Almost surely, 2^{21021301120223} is an apocalyptic number.

21021301120223 is a deficient number, since it is larger than the sum of its proper divisors (1236547124737).

21021301120223 is a wasteful number, since it uses less digits than its factorization.

21021301120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236547124736.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21021301120223 its reverse (32202110312012), we get a palindrome (53223411432235).

The spelling of 21021301120223 in words is "twenty-one trillion, twenty-one billion, three hundred one million, one hundred twenty thousand, two hundred twenty-three".