21302222123 has 12 divisors (see below), whose sum is σ = 26686301040. Its totient is φ = 16854504912.

The previous prime is 21302222119. The next prime is 21302222131. The reversal of 21302222123 is 32122220312.

It is a happy number.

It is not a de Polignac number, because 21302222123 - 2² = 21302222119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21302222095 and 21302222104.

It is not an unprimeable number, because it can be changed into a prime (21302222423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16720103 + ... + 16721376.

It is an arithmetic number, because the mean of its divisors is an integer number (2223858420).

Almost surely, 2^21302222123 is an apocalyptic number.

21302222123 is a deficient number, since it is larger than the sum of its proper divisors (5384078917).

21302222123 is a wasteful number, since it uses less digits than its factorization.

21302222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33441506 (or 33441499 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21302222123 its reverse (32122220312), we get a palindrome (53424442435).

The spelling of 21302222123 in words is "twenty-one billion, three hundred two million, two hundred twenty-two thousand, one hundred twenty-three".