21302323122 has 16 divisors (see below), whose sum is σ = 42623254080. Its totient is φ = 7097673072.

The previous prime is 21302323121. The next prime is 21302323123. The reversal of 21302323122 is 22132320312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21302323121) and next prime (21302323123).

It is not an unprimeable number, because it can be changed into a prime (21302323121) 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, 760422 + ... + 787937.

It is an arithmetic number, because the mean of its divisors is an integer number (2663953380).

Almost surely, 2^21302323122 is an apocalyptic number.

21302323122 is an abundant number, since it is smaller than the sum of its proper divisors (21320930958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302323122 is a wasteful number, since it uses less digits than its factorization.

21302323122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550657.

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

Adding to 21302323122 its reverse (22132320312), we get a palindrome (43434643434).

The spelling of 21302323122 in words is "twenty-one billion, three hundred two million, three hundred twenty-three thousand, one hundred twenty-two".