21410132221 has 4 divisors (see below), whose sum is σ = 21411770944. Its totient is φ = 21408493500.

The previous prime is 21410132171. The next prime is 21410132257. The reversal of 21410132221 is 12223101412.

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 21410132221 - 2⁹ = 21410131709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410135221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799605 + ... + 825946.

It is an arithmetic number, because the mean of its divisors is an integer number (5352942736).

Almost surely, 2^21410132221 is an apocalyptic number.

It is an amenable number.

21410132221 is a deficient number, since it is larger than the sum of its proper divisors (1638723).

21410132221 is a wasteful number, since it uses less digits than its factorization.

21410132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638722.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21410132221 its reverse (12223101412), we get a palindrome (33633233633).

The spelling of 21410132221 in words is "twenty-one billion, four hundred ten million, one hundred thirty-two thousand, two hundred twenty-one".