21223212211303 has 4 divisors (see below), whose sum is σ = 21623650177608. Its totient is φ = 20822774245000.

The previous prime is 21223212211259. The next prime is 21223212211367. The reversal of 21223212211303 is 30311221232212.

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 21223212211303 - 2³³ = 21214622276711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223212211603) 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, 200218983073 + ... + 200218983178.

It is an arithmetic number, because the mean of its divisors is an integer number (5405912544402).

Almost surely, 2^{21223212211303} is an apocalyptic number.

21223212211303 is a deficient number, since it is larger than the sum of its proper divisors (400437966305).

21223212211303 is an equidigital number, since it uses as much as digits as its factorization.

21223212211303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400437966304.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21223212211303 its reverse (30311221232212), we get a palindrome (51534433443515).

The spelling of 21223212211303 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twelve million, two hundred eleven thousand, three hundred three".