21168920461141 has 4 divisors (see below), whose sum is σ = 21619323024192. Its totient is φ = 20718517898092.

The previous prime is 21168920461133. The next prime is 21168920461187. The reversal of 21168920461141 is 14116402986112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21168920461141 - 2³ = 21168920461133 is a prime.

It is a super-2 number, since 2×21168920461141² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21168920461091 and 21168920461100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21168920411141) 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, 225201281455 + ... + 225201281548.

It is an arithmetic number, because the mean of its divisors is an integer number (5404830756048).

Almost surely, 2^{21168920461141} is an apocalyptic number.

It is an amenable number.

21168920461141 is a deficient number, since it is larger than the sum of its proper divisors (450402563051).

21168920461141 is an equidigital number, since it uses as much as digits as its factorization.

21168920461141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450402563050.

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 21168920461141 in words is "twenty-one trillion, one hundred sixty-eight billion, nine hundred twenty million, four hundred sixty-one thousand, one hundred forty-one".