21341032161 has 64 divisors (see below), whose sum is σ = 32893286400. Its totient is φ = 12220886016.

The previous prime is 21341032133. The next prime is 21341032187. The reversal of 21341032161 is 16123014312.

It is a happy number.

It is not a de Polignac number, because 21341032161 - 2³¹ = 19193548513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21341032561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3689970 + ... + 3695748.

It is an arithmetic number, because the mean of its divisors is an integer number (513957600).

Almost surely, 2^21341032161 is an apocalyptic number.

It is an amenable number.

21341032161 is a deficient number, since it is larger than the sum of its proper divisors (11552254239).

21341032161 is a wasteful number, since it uses less digits than its factorization.

21341032161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21341032161 its reverse (16123014312), we get a palindrome (37464046473).

The spelling of 21341032161 in words is "twenty-one billion, three hundred forty-one million, thirty-two thousand, one hundred sixty-one".