20120220201220 has 12 divisors (see below), whose sum is σ = 42252462422604. Its totient is φ = 8048088080480.

The previous prime is 20120220201187. The next prime is 20120220201227. The reversal of 20120220201220 is 2210202202102.

It can be written as a sum of positive squares in 2 ways, for example, as 11911112757504 + 8209107443716 = 3451248^2 + 2865154^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20120220201194 and 20120220201203.

It is not an unprimeable number, because it can be changed into a prime (20120220201227) 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, 503005505011 + ... + 503005505050.

It is an arithmetic number, because the mean of its divisors is an integer number (3521038535217).

Almost surely, 2^{20120220201220} is an apocalyptic number.

20120220201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120220201220 is an abundant number, since it is smaller than the sum of its proper divisors (22132242221384).

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

20120220201220 is a wasteful number, since it uses less digits than its factorization.

20120220201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006011010070 (or 1006011010068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20120220201220 its reverse (2210202202102), we get a palindrome (22330422403322).

The spelling of 20120220201220 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, two hundred one thousand, two hundred twenty".