20321220122 has 12 divisors (see below), whose sum is σ = 35458455690. Its totient is φ = 8709094296.

The previous prime is 20321220077. The next prime is 20321220133. The reversal of 20321220122 is 22102212302.

20321220122 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 14356592761 + 5964627361 = 119819^2 + 77231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20321220122.

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 in 5 ways as a sum of consecutive naturals, for example, 103679597 + ... + 103679792.

Almost surely, 2^20321220122 is an apocalyptic number.

20321220122 is a deficient number, since it is larger than the sum of its proper divisors (15137235568).

20321220122 is a wasteful number, since it uses less digits than its factorization.

20321220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207359405 (or 207359398 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20321220122 its reverse (22102212302), we get a palindrome (42423432424).

The spelling of 20321220122 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".