21012302221323 has 16 divisors (see below), whose sum is σ = 32018810273280. Its totient is φ = 12007005829056.

The previous prime is 21012302221303. The next prime is 21012302221411. The reversal of 21012302221323 is 32312220321012.

It is not a de Polignac number, because 21012302221323 - 2²⁴ = 21012285444107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21012302221293 and 21012302221302.

It is not an unprimeable number, because it can be changed into a prime (21012302221303) 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, 20085186 + ... + 21105432.

It is an arithmetic number, because the mean of its divisors is an integer number (2001175642080).

Almost surely, 2^{21012302221323} is an apocalyptic number.

21012302221323 is a deficient number, since it is larger than the sum of its proper divisors (11006508051957).

21012302221323 is a wasteful number, since it uses less digits than its factorization.

21012302221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000986.

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

Adding to 21012302221323 its reverse (32312220321012), we get a palindrome (53324522542335).

The spelling of 21012302221323 in words is "twenty-one trillion, twelve billion, three hundred two million, two hundred twenty-one thousand, three hundred twenty-three".