21242213303 has 8 divisors (see below), whose sum is σ = 22493903472. Its totient is φ = 19990761856.

The previous prime is 21242213299. The next prime is 21242213329. The reversal of 21242213303 is 30331224212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21242213303 - 2² = 21242213299 is a prime.

It is a super-3 number, since 3×21242213303³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242213803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143276 + ... + 251022.

It is an arithmetic number, because the mean of its divisors is an integer number (2811737934).

Almost surely, 2^21242213303 is an apocalyptic number.

21242213303 is a deficient number, since it is larger than the sum of its proper divisors (1251690169).

21242213303 is a wasteful number, since it uses less digits than its factorization.

21242213303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119361.

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

Adding to 21242213303 its reverse (30331224212), we get a palindrome (51573437515).

The spelling of 21242213303 in words is "twenty-one billion, two hundred forty-two million, two hundred thirteen thousand, three hundred three".