21033201321211 has 4 divisors (see below), whose sum is σ = 21033480436632. Its totient is φ = 21032922205792.

The previous prime is 21033201321179. The next prime is 21033201321233. The reversal of 21033201321211 is 11212310233012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21033201321211 - 2⁵ = 21033201321179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033201324211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139444645 + ... + 139595398.

It is an arithmetic number, because the mean of its divisors is an integer number (5258370109158).

Almost surely, 2^{21033201321211} is an apocalyptic number.

21033201321211 is a deficient number, since it is larger than the sum of its proper divisors (279115421).

21033201321211 is an equidigital number, since it uses as much as digits as its factorization.

21033201321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279115420.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21033201321211 its reverse (11212310233012), we get a palindrome (32245511554223).

The spelling of 21033201321211 in words is "twenty-one trillion, thirty-three billion, two hundred one million, three hundred twenty-one thousand, two hundred eleven".