2011221010 has 8 divisors (see below), whose sum is σ = 3620197836. Its totient is φ = 804488400.

The previous prime is 2011220999. The next prime is 2011221049. The reversal of 2011221010 is 101221102.

It can be written as a sum of positive squares in 2 ways, for example, as 1644383601 + 366837409 = 40551^2 + 19153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 201122101 = 2011221010 / (2 + 0 + 1 + 1 + 2 + 2 + 1 + 0 + 1 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100561041 + ... + 100561060.

Almost surely, 2^2011221010 is an apocalyptic number.

2011221010 is a deficient number, since it is larger than the sum of its proper divisors (1608976826).

2011221010 is a wasteful number, since it uses less digits than its factorization.

2011221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201122108.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2011221010 is about 44846.6387815185. The cubic root of 2011221010 is about 1262.2729214177.

Adding to 2011221010 its reverse (101221102), we get a palindrome (2112442112).

The spelling of 2011221010 in words is "two billion, eleven million, two hundred twenty-one thousand, ten".