21223203341 has 4 divisors (see below), whose sum is σ = 21378117372. Its totient is φ = 21068289312.

The previous prime is 21223203277. The next prime is 21223203373. The reversal of 21223203341 is 14330232212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15632500900 + 5590702441 = 125030^2 + 74771^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223203341 - 2⁶ = 21223203277 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 (21223208341) 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, 77456810 + ... + 77457083.

It is an arithmetic number, because the mean of its divisors is an integer number (5344529343).

Almost surely, 2^21223203341 is an apocalyptic number.

It is an amenable number.

21223203341 is a deficient number, since it is larger than the sum of its proper divisors (154914031).

21223203341 is a wasteful number, since it uses less digits than its factorization.

21223203341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154914030.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21223203341 its reverse (14330232212), we get a palindrome (35553435553).

The spelling of 21223203341 in words is "twenty-one billion, two hundred twenty-three million, two hundred three thousand, three hundred forty-one".