2011012321 has 4 divisors (see below), whose sum is σ = 2060061444. Its totient is φ = 1961963200.

The previous prime is 2011012319. The next prime is 2011012327. The reversal of 2011012321 is 1232101102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 957036096 + 1053976225 = 30936^2 + 32465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011012321 - 2¹ = 2011012319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011012327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24524500 + ... + 24524581.

It is an arithmetic number, because the mean of its divisors is an integer number (515015361).

Almost surely, 2^2011012321 is an apocalyptic number.

It is an amenable number.

2011012321 is a deficient number, since it is larger than the sum of its proper divisors (49049123).

2011012321 is an equidigital number, since it uses as much as digits as its factorization.

2011012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49049122.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2011012321 is about 44844.3120250495. The cubic root of 2011012321 is about 1262.2292611099.

Adding to 2011012321 its reverse (1232101102), we get a palindrome (3243113423).

The spelling of 2011012321 in words is "two billion, eleven million, twelve thousand, three hundred twenty-one".