20120112120220 has 48 divisors (see below), whose sum is σ = 49593357455040. Its totient is φ = 6711882960384.

The previous prime is 20120112120197. The next prime is 20120112120259. The reversal of 20120112120220 is 2202121102102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20120112120194 and 20120112120203.

It is a congruent number.

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, 1942090585 + ... + 1942100944.

It is an arithmetic number, because the mean of its divisors is an integer number (1033194946980).

Almost surely, 2^{20120112120220} is an apocalyptic number.

20120112120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120112120220 is an abundant number, since it is smaller than the sum of its proper divisors (29473245334820).

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

20120112120220 is a wasteful number, since it uses less digits than its factorization.

20120112120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884191582 (or 3884191580 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20120112120220 its reverse (2202121102102), we get a palindrome (22322233222322).

The spelling of 20120112120220 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty".