21320102422243 has 4 divisors (see below), whose sum is σ = 21815918757688. Its totient is φ = 20824286086800.

The previous prime is 21320102422211. The next prime is 21320102422247. The reversal of 21320102422243 is 34222420102312.

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 21320102422243 - 2⁵ = 21320102422211 is a prime.

It is a super-2 number, since 2×21320102422243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21320102422247) 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, 247908167658 + ... + 247908167743.

It is an arithmetic number, because the mean of its divisors is an integer number (5453979689422).

Almost surely, 2^{21320102422243} is an apocalyptic number.

21320102422243 is a deficient number, since it is larger than the sum of its proper divisors (495816335445).

21320102422243 is an equidigital number, since it uses as much as digits as its factorization.

21320102422243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495816335444.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21320102422243 its reverse (34222420102312), we get a palindrome (55542522524555).

The spelling of 21320102422243 in words is "twenty-one trillion, three hundred twenty billion, one hundred two million, four hundred twenty-two thousand, two hundred forty-three".