2021205343255 has 32 divisors (see below), whose sum is σ = 2892819225600. Its totient is φ = 1325544202752.

The previous prime is 2021205343231. The next prime is 2021205343327. The reversal of 2021205343255 is 5523435021202.

It is a de Polignac number, because none of the positive numbers 2^k-2021205343255 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021205343255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6463551 + ... + 6769039.

It is an arithmetic number, because the mean of its divisors is an integer number (90400600800).

Almost surely, 2^{2021205343255} is an apocalyptic number.

2021205343255 is a deficient number, since it is larger than the sum of its proper divisors (871613882345).

2021205343255 is a wasteful number, since it uses less digits than its factorization.

2021205343255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313743.

The product of its (nonzero) digits is 72000, while the sum is 34.

The spelling of 2021205343255 in words is "two trillion, twenty-one billion, two hundred five million, three hundred forty-three thousand, two hundred fifty-five".