2021134500161 has 8 divisors (see below), whose sum is σ = 2389518621120. Its totient is φ = 1672663034448.

The previous prime is 2021134500149. The next prime is 2021134500163. The reversal of 2021134500161 is 1610054311202.

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

It is not a de Polignac number, because 2021134500161 - 2¹⁸ = 2021134238017 is a prime.

It is a super-3 number, since 3×2021134500161³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021134500161.

It is not an unprimeable number, because it can be changed into a prime (2021134500163) 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, 4978163591 + ... + 4978163996.

It is an arithmetic number, because the mean of its divisors is an integer number (298689827640).

Almost surely, 2^{2021134500161} is an apocalyptic number.

It is an amenable number.

2021134500161 is a deficient number, since it is larger than the sum of its proper divisors (368384120959).

2021134500161 is an equidigital number, since it uses as much as digits as its factorization.

2021134500161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956327623.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 2021134500161 its reverse (1610054311202), we get a palindrome (3631188811363).

The spelling of 2021134500161 in words is "two trillion, twenty-one billion, one hundred thirty-four million, five hundred thousand, one hundred sixty-one".