21221310132211 has 8 divisors (see below), whose sum is σ = 24252967157760. Its totient is φ = 18189663429768.

The previous prime is 21221310132193. The next prime is 21221310132221. The reversal of 21221310132211 is 11223101312212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21221310132211 - 2⁹ = 21221310131699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221310132221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2488020 + ... + 6973726.

It is an arithmetic number, because the mean of its divisors is an integer number (3031620894720).

Almost surely, 2^{21221310132211} is an apocalyptic number.

21221310132211 is a deficient number, since it is larger than the sum of its proper divisors (3031657025549).

21221310132211 is an equidigital number, since it uses as much as digits as its factorization.

21221310132211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161553.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21221310132211 its reverse (11223101312212), we get a palindrome (32444411444423).

The spelling of 21221310132211 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred ten million, one hundred thirty-two thousand, two hundred eleven".