20121220122 has 32 divisors (see below), whose sum is σ = 40501091904. Its totient is φ = 6664032000.

The previous prime is 20121220117. The next prime is 20121220151. The reversal of 20121220122 is 22102212102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1296573 + ... + 1311999.

It is an arithmetic number, because the mean of its divisors is an integer number (1265659122).

Almost surely, 2^20121220122 is an apocalyptic number.

20121220122 is an abundant number, since it is smaller than the sum of its proper divisors (20379871782).

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

20121220122 is a wasteful number, since it uses less digits than its factorization.

20121220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16814.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20121220122 its reverse (22102212102), we get a palindrome (42223432224).

The spelling of 20121220122 in words is "twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".