21202323122 has 8 divisors (see below), whose sum is σ = 31815757596. Its totient is φ = 10597070592.

The previous prime is 21202323097. The next prime is 21202323127. The reversal of 21202323122 is 22132320212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19209682801 + 1992640321 = 138599^2 + 44639^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21202323094 and 21202323103.

It is not an unprimeable number, because it can be changed into a prime (21202323127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2039003 + ... + 2049374.

Almost surely, 2^21202323122 is an apocalyptic number.

21202323122 is a deficient number, since it is larger than the sum of its proper divisors (10613434474).

21202323122 is a wasteful number, since it uses less digits than its factorization.

21202323122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090972.

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

Adding to 21202323122 its reverse (22132320212), we get a palindrome (43334643334).

The spelling of 21202323122 in words is "twenty-one billion, two hundred two million, three hundred twenty-three thousand, one hundred twenty-two".