21322231203 has 64 divisors (see below), whose sum is σ = 36054789120. Its totient is φ = 10906762752.

The previous prime is 21322231193. The next prime is 21322231247. The reversal of 21322231203 is 30213222312.

It is a happy number.

It is not a de Polignac number, because 21322231203 - 2⁴ = 21322231187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21322231203.

It is not an unprimeable number, because it can be changed into a prime (21322231253) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3198688 + ... + 3205346.

It is an arithmetic number, because the mean of its divisors is an integer number (563356080).

Almost surely, 2^21322231203 is an apocalyptic number.

21322231203 is a deficient number, since it is larger than the sum of its proper divisors (14732557917).

21322231203 is a wasteful number, since it uses less digits than its factorization.

21322231203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036.

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

Adding to 21322231203 its reverse (30213222312), we get a palindrome (51535453515).

The spelling of 21322231203 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-one thousand, two hundred three".