21211222303 has 8 divisors (see below), whose sum is σ = 22541820480. Its totient is φ = 19889832960.

The previous prime is 21211222231. The next prime is 21211222391. The reversal of 21211222303 is 30322211212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211222303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211222393) 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, 2297458 + ... + 2306671.

It is an arithmetic number, because the mean of its divisors is an integer number (2817727560).

Almost surely, 2^21211222303 is an apocalyptic number.

21211222303 is a deficient number, since it is larger than the sum of its proper divisors (1330598177).

21211222303 is a wasteful number, since it uses less digits than its factorization.

21211222303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604417.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21211222303 its reverse (30322211212), we get a palindrome (51533433515).

The spelling of 21211222303 in words is "twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, three hundred three".