2021211444 has 48 divisors (see below), whose sum is σ = 5463747968. Its totient is φ = 569576448.

The previous prime is 2021211433. The next prime is 2021211487. The reversal of 2021211444 is 4441121202.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2021211444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158677 + ... + 170940.

Almost surely, 2^2021211444 is an apocalyptic number.

It is an amenable number.

2021211444 is an abundant number, since it is smaller than the sum of its proper divisors (3442536524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021211444 is a wasteful number, since it uses less digits than its factorization.

2021211444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329704 (or 329702 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 2021211444 is about 44957.8852260646. The cubic root of 2021211444 is about 1264.3595197544.

Adding to 2021211444 its reverse (4441121202), we get a palindrome (6462332646).

The spelling of 2021211444 in words is "two billion, twenty-one million, two hundred eleven thousand, four hundred forty-four".