21120323122 has 4 divisors (see below), whose sum is σ = 31680484686. Its totient is φ = 10560161560.

The previous prime is 21120323083. The next prime is 21120323141. The reversal of 21120323122 is 22132302112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18206374761 + 2913948361 = 134931^2 + 53981^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21120323122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5280080779 + ... + 5280080782.

Almost surely, 2^21120323122 is an apocalyptic number.

21120323122 is a deficient number, since it is larger than the sum of its proper divisors (10560161564).

21120323122 is a wasteful number, since it uses less digits than its factorization.

21120323122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560161563.

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

Adding to 21120323122 its reverse (22132302112), we get a palindrome (43252625234).

The spelling of 21120323122 in words is "twenty-one billion, one hundred twenty million, three hundred twenty-three thousand, one hundred twenty-two".