2021211440 has 40 divisors (see below), whose sum is σ = 4813941888. Its totient is φ = 788764160.

The previous prime is 2021211433. The next prime is 2021211487. The reversal of 2021211440 is 441121202.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304832 + ... + 311391.

Almost surely, 2^2021211440 is an apocalyptic number.

2021211440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021211440 is an abundant number, since it is smaller than the sum of its proper divisors (2792730448).

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

2021211440 is a wasteful number, since it uses less digits than its factorization.

2021211440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616277 (or 616271 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2021211440 is about 44957.8851815785. The cubic root of 2021211440 is about 1264.3595189204.

Adding to 2021211440 its reverse (441121202), we get a palindrome (2462332642).

The spelling of 2021211440 in words is "two billion, twenty-one million, two hundred eleven thousand, four hundred forty".