2012011221220 has 192 divisors, whose sum is σ = 5811396337152. Its totient is φ = 564761088000.

The previous prime is 2012011221203. The next prime is 2012011221257. The reversal of 2012011221220 is 221221102102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2012011221194 and 2012011221203.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 404791 + ... + 2046430.

It is an arithmetic number, because the mean of its divisors is an integer number (30267689256).

Almost surely, 2^{2012011221220} is an apocalyptic number.

2012011221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012011221220 is an abundant number, since it is smaller than the sum of its proper divisors (3799385115932).

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

2012011221220 is a wasteful number, since it uses less digits than its factorization.

2012011221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451302 (or 2451300 counting only the distinct ones).

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

Adding to 2012011221220 its reverse (221221102102), we get a palindrome (2233232323322).

The spelling of 2012011221220 in words is "two trillion, twelve billion, eleven million, two hundred twenty-one thousand, two hundred twenty".