2012801220 has 36 divisors (see below), whose sum is σ = 6105497580. Its totient is φ = 536746944.

The previous prime is 2012801213. The next prime is 2012801243. The reversal of 2012801220 is 221082102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 930128004 + 1082673216 = 30498^2 + 32904^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2012801193 and 2012801202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5590935 + ... + 5591294.

It is an arithmetic number, because the mean of its divisors is an integer number (169597155).

Almost surely, 2^2012801220 is an apocalyptic number.

2012801220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012801220 is an abundant number, since it is smaller than the sum of its proper divisors (4092696360).

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

2012801220 is a wasteful number, since it uses less digits than its factorization.

2012801220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182244 (or 11182239 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2012801220 is about 44864.2532535648. The cubic root of 2012801220 is about 1262.6034228251.

Adding to 2012801220 its reverse (221082102), we get a palindrome (2233883322).

It can be divided in two parts, 2012801 and 220, that added together give a triangular number (2013021 = T₂₀₀₆).

The spelling of 2012801220 in words is "two billion, twelve million, eight hundred one thousand, two hundred twenty".