2021110240340 has 24 divisors (see below), whose sum is σ = 4245185875560. Its totient is φ = 808281358848.

The previous prime is 2021110240309. The next prime is 2021110240349. The reversal of 2021110240340 is 430420111202.

It can be written as a sum of positive squares in 4 ways, for example, as 511745652496 + 1509364587844 = 715364^2 + 1228562^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021110240349) 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, 10069217 + ... + 10267976.

It is an arithmetic number, because the mean of its divisors is an integer number (176882744815).

Almost surely, 2^{2021110240340} is an apocalyptic number.

2021110240340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021110240340 is an abundant number, since it is smaller than the sum of its proper divisors (2224075635220).

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

2021110240340 is a wasteful number, since it uses less digits than its factorization.

2021110240340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20342171 (or 20342169 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2021110240340 its reverse (430420111202), we get a palindrome (2451530351542).

The spelling of 2021110240340 in words is "two trillion, twenty-one billion, one hundred ten million, two hundred forty thousand, three hundred forty".