21410132321 has 4 divisors (see below), whose sum is σ = 21444721200. Its totient is φ = 21375543444.

The previous prime is 21410132257. The next prime is 21410132327. The reversal of 21410132321 is 12323101412.

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 21410132321 - 2⁶ = 21410132257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21410132293 and 21410132302.

It is not an unprimeable number, because it can be changed into a prime (21410132327) 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, 17293511 + ... + 17294748.

It is an arithmetic number, because the mean of its divisors is an integer number (5361180300).

Almost surely, 2^21410132321 is an apocalyptic number.

It is an amenable number.

21410132321 is a deficient number, since it is larger than the sum of its proper divisors (34588879).

21410132321 is an equidigital number, since it uses as much as digits as its factorization.

21410132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34588878.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21410132321 its reverse (12323101412), we get a palindrome (33733233733).

The spelling of 21410132321 in words is "twenty-one billion, four hundred ten million, one hundred thirty-two thousand, three hundred twenty-one".