2011221152 has 12 divisors (see below), whose sum is σ = 3959591706. Its totient is φ = 1005610560.

The previous prime is 2011221127. The next prime is 2011221169. The reversal of 2011221152 is 2511221102.

It can be written as a sum of positive squares in only one way, i.e., 1975269136 + 35952016 = 44444^2 + 5996^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2011221152.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31425299 + ... + 31425362.

Almost surely, 2^2011221152 is an apocalyptic number.

It is an amenable number.

2011221152 is a deficient number, since it is larger than the sum of its proper divisors (1948370554).

2011221152 is an equidigital number, since it uses as much as digits as its factorization.

2011221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62850671 (or 62850663 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2011221152 is about 44846.6403646918. The cubic root of 2011221152 is about 1262.2729511249.

Adding to 2011221152 its reverse (2511221102), we get a palindrome (4522442254).

The spelling of 2011221152 in words is "two billion, eleven million, two hundred twenty-one thousand, one hundred fifty-two".