3111444021 has 32 divisors (see below), whose sum is σ = 4833174528. Its totient is φ = 1743730560.

The previous prime is 3111443999. The next prime is 3111444031. The reversal of 3111444021 is 1204441113.

It is not a de Polignac number, because 3111444021 - 2⁷ = 3111443893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3111444031) 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 31 ways as a sum of consecutive naturals, for example, 323086 + ... + 332576.

It is an arithmetic number, because the mean of its divisors is an integer number (151036704).

Almost surely, 2^3111444021 is an apocalyptic number.

It is an amenable number.

3111444021 is a deficient number, since it is larger than the sum of its proper divisors (1721730507).

3111444021 is a wasteful number, since it uses less digits than its factorization.

3111444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9801.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 3111444021 is about 55780.3192981180. The cubic root of 3111444021 is about 1459.8917823398.

Adding to 3111444021 its reverse (1204441113), we get a palindrome (4315885134).

The spelling of 3111444021 in words is "three billion, one hundred eleven million, four hundred forty-four thousand, twenty-one".