21162041641033 has 4 divisors (see below), whose sum is σ = 21162087893700. Its totient is φ = 21161995388368.

The previous prime is 21162041641031. The next prime is 21162041641051. The reversal of 21162041641033 is 33014614026112.

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 5706976989184 + 15455064651849 = 2388928^2 + 3931293^2 .

It is a cyclic number.

It is not a de Polignac number, because 21162041641033 - 2¹ = 21162041641031 is a prime.

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 21162041641033.

It is not an unprimeable number, because it can be changed into a prime (21162041641031) 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, 22433110 + ... + 23357407.

It is an arithmetic number, because the mean of its divisors is an integer number (5290521973425).

Almost surely, 2^{21162041641033} is an apocalyptic number.

It is an amenable number.

21162041641033 is a deficient number, since it is larger than the sum of its proper divisors (46252667).

21162041641033 is an equidigital number, since it uses as much as digits as its factorization.

21162041641033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46252666.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 21162041641033 its reverse (33014614026112), we get a palindrome (54176655667145).

The spelling of 21162041641033 in words is "twenty-one trillion, one hundred sixty-two billion, forty-one million, six hundred forty-one thousand, thirty-three".