2012120121220 has 48 divisors (see below), whose sum is σ = 4621619939328. Its totient is φ = 729769621760.

The previous prime is 2012120121211. The next prime is 2012120121241. The reversal of 2012120121220 is 221210212102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2012120121194 and 2012120121203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11855689 + ... + 12024208.

It is an arithmetic number, because the mean of its divisors is an integer number (96283748736).

Almost surely, 2^{2012120121220} is an apocalyptic number.

2012120121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012120121220 is an abundant number, since it is smaller than the sum of its proper divisors (2609499818108).

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

2012120121220 is a wasteful number, since it uses less digits than its factorization.

2012120121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23880300 (or 23880298 counting only the distinct ones).

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

Adding to 2012120121220 its reverse (221210212102), we get a palindrome (2233330333322).

The spelling of 2012120121220 in words is "two trillion, twelve billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty".