2021021253461 has 8 divisors (see below), whose sum is σ = 2309781003840. Its totient is φ = 1732272110208.

The previous prime is 2021021253451. The next prime is 2021021253469. The reversal of 2021021253461 is 1643521201202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021021253461 - 2²⁶ = 2020954144597 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 (2021021253469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2239211 + ... + 3009336.

It is an arithmetic number, because the mean of its divisors is an integer number (288722625480).

Almost surely, 2^{2021021253461} is an apocalyptic number.

It is an amenable number.

2021021253461 is a deficient number, since it is larger than the sum of its proper divisors (288759750379).

2021021253461 is an equidigital number, since it uses as much as digits as its factorization.

2021021253461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303563.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 2021021253461 its reverse (1643521201202), we get a palindrome (3664542454663).

The spelling of 2021021253461 in words is "two trillion, twenty-one billion, twenty-one million, two hundred fifty-three thousand, four hundred sixty-one".