2021312040 has 64 divisors (see below), whose sum is σ = 6615207360. Its totient is φ = 490014720.

The previous prime is 2021311969. The next prime is 2021312057. The reversal of 2021312040 is 402131202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764329 + ... + 766968.

It is an arithmetic number, because the mean of its divisors is an integer number (103362615).

Almost surely, 2^2021312040 is an apocalyptic number.

2021312040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021312040 is an abundant number, since it is smaller than the sum of its proper divisors (4593895320).

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

2021312040 is a wasteful number, since it uses less digits than its factorization.

2021312040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531322 (or 1531318 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2021312040 is about 44959.0039925263. The cubic root of 2021312040 is about 1264.3804951948.

Adding to 2021312040 its reverse (402131202), we get a palindrome (2423443242).

The spelling of 2021312040 in words is "two billion, twenty-one million, three hundred twelve thousand, forty".