20121221032122 has 64 divisors (see below), whose sum is σ = 46226239027200. Its totient is φ = 5719565421504.

The previous prime is 20121221032117. The next prime is 20121221032189. The reversal of 20121221032122 is 22123012212102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109924908 + ... + 110107800.

It is an arithmetic number, because the mean of its divisors is an integer number (722284984800).

Almost surely, 2^{20121221032122} is an apocalyptic number.

20121221032122 is an abundant number, since it is smaller than the sum of its proper divisors (26105017995078).

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

20121221032122 is a wasteful number, since it uses less digits than its factorization.

20121221032122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196267.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20121221032122 its reverse (22123012212102), we get a palindrome (42244233244224).

The spelling of 20121221032122 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-one million, thirty-two thousand, one hundred twenty-two".