21000000411223 has 16 divisors (see below), whose sum is σ = 21178466543520. Its totient is φ = 20822288288256.

The previous prime is 21000000411199. The next prime is 21000000411259. The reversal of 21000000411223 is 32211400000012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000000411223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000000411197 and 21000000411206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000007411223) 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, 317336083 + ... + 317402251.

It is an arithmetic number, because the mean of its divisors is an integer number (1323654158970).

Almost surely, 2^{21000000411223} is an apocalyptic number.

21000000411223 is a deficient number, since it is larger than the sum of its proper divisors (178466132297).

21000000411223 is a wasteful number, since it uses less digits than its factorization.

21000000411223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71826.

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

Adding to 21000000411223 its reverse (32211400000012), we get a palindrome (53211400411235).

The spelling of 21000000411223 in words is "twenty-one trillion, four hundred eleven thousand, two hundred twenty-three".