21221030343 has 8 divisors (see below), whose sum is σ = 29270386800. Its totient is φ = 13659513728.

The previous prime is 21221030287. The next prime is 21221030371. The reversal of 21221030343 is 34303012212.

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

It is a cyclic number.

It is not a de Polignac number, because 21221030343 - 2¹⁸ = 21220768199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221030543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121959858 + ... + 121960031.

It is an arithmetic number, because the mean of its divisors is an integer number (3658798350).

Almost surely, 2^21221030343 is an apocalyptic number.

21221030343 is a deficient number, since it is larger than the sum of its proper divisors (8049356457).

21221030343 is a wasteful number, since it uses less digits than its factorization.

21221030343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243919921.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21221030343 its reverse (34303012212), we get a palindrome (55524042555).

The spelling of 21221030343 in words is "twenty-one billion, two hundred twenty-one million, thirty thousand, three hundred forty-three".