2021055253663 has 4 divisors (see below), whose sum is σ = 2049520820688. Its totient is φ = 1992589686640.

The previous prime is 2021055253661. The next prime is 2021055253691. The reversal of 2021055253663 is 3663525501202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021055253663 - 2¹ = 2021055253661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021055253661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14232783406 + ... + 14232783547.

It is an arithmetic number, because the mean of its divisors is an integer number (512380205172).

Almost surely, 2^{2021055253663} is an apocalyptic number.

2021055253663 is a deficient number, since it is larger than the sum of its proper divisors (28465567025).

2021055253663 is an equidigital number, since it uses as much as digits as its factorization.

2021055253663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28465567024.

The product of its (nonzero) digits is 324000, while the sum is 40.

The spelling of 2021055253663 in words is "two trillion, twenty-one billion, fifty-five million, two hundred fifty-three thousand, six hundred sixty-three".