2012221000 has 32 divisors (see below), whose sum is σ = 4708599480. Its totient is φ = 804888000.

The previous prime is 2012220989. The next prime is 2012221007. The reversal of 2012221000 is 1222102.

It can be written as a sum of positive squares in 4 ways, for example, as 814645764 + 1197575236 = 28542^2 + 34606^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (2012221007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005111 + ... + 1007110.

Almost surely, 2^2012221000 is an apocalyptic number.

2012221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012221000 is an abundant number, since it is smaller than the sum of its proper divisors (2696378480).

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

2012221000 is a wasteful number, since it uses less digits than its factorization.

2012221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012242 (or 2012228 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2012221000 is about 44857.7863921081. The cubic root of 2012221000 is about 1262.4820897371.

Adding to 2012221000 its reverse (1222102), we get a palindrome (2013443102).

The spelling of 2012221000 in words is "two billion, twelve million, two hundred twenty-one thousand".