2021210440 has 32 divisors (see below), whose sum is σ = 4615606080. Its totient is φ = 796416192.

The previous prime is 2021210431. The next prime is 2021210441. The reversal of 2021210440 is 440121202.

It is not an unprimeable number, because it can be changed into a prime (2021210441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374412 + ... + 379771.

It is an arithmetic number, because the mean of its divisors is an integer number (144237690).

Almost surely, 2^2021210440 is an apocalyptic number.

2021210440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021210440 is an abundant number, since it is smaller than the sum of its proper divisors (2594395640).

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

2021210440 is a wasteful number, since it uses less digits than its factorization.

2021210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754261 (or 754257 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2021210440 is about 44957.8740600576. The cubic root of 2021210440 is about 1264.3593104052.

Adding to 2021210440 its reverse (440121202), we get a palindrome (2461331642).

The spelling of 2021210440 in words is "two billion, twenty-one million, two hundred ten thousand, four hundred forty".