2011232021 has 4 divisors (see below), whose sum is σ = 2011345344. Its totient is φ = 2011118700.

The previous prime is 2011232011. The next prime is 2011232147. The reversal of 2011232021 is 1202321102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011232021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011231987 and 2011232005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011232011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23615 + ... + 67676.

It is an arithmetic number, because the mean of its divisors is an integer number (502836336).

Almost surely, 2^2011232021 is an apocalyptic number.

It is an amenable number.

2011232021 is a deficient number, since it is larger than the sum of its proper divisors (113323).

2011232021 is an equidigital number, since it uses as much as digits as its factorization.

2011232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113322.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2011232021 is about 44846.7615441740. The cubic root of 2011232021 is about 1262.2752249706.

Adding to 2011232021 its reverse (1202321102), we get a palindrome (3213553123).

The spelling of 2011232021 in words is "two billion, eleven million, two hundred thirty-two thousand, twenty-one".