421161616133 has 4 divisors (see below), whose sum is σ = 421166560908. Its totient is φ = 421156671360.

The previous prime is 421161616081. The next prime is 421161616177. The reversal of 421161616133 is 331616161124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 343182729124 + 77978887009 = 585818^2 + 279247^2 .

It is a cyclic number.

It is not a de Polignac number, because 421161616133 - 2¹⁰ = 421161615109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421161616093 and 421161616102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421161613133) 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, 2342348 + ... + 2515733.

It is an arithmetic number, because the mean of its divisors is an integer number (105291640227).

Almost surely, 2^421161616133 is an apocalyptic number.

It is an amenable number.

421161616133 is a deficient number, since it is larger than the sum of its proper divisors (4944775).

421161616133 is an equidigital number, since it uses as much as digits as its factorization.

421161616133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944774.

The product of its digits is 15552, while the sum is 35.

Adding to 421161616133 its reverse (331616161124), we get a palindrome (752777777257).

The spelling of 421161616133 in words is "four hundred twenty-one billion, one hundred sixty-one million, six hundred sixteen thousand, one hundred thirty-three".