21321210203311 has 16 divisors (see below), whose sum is σ = 22560570819040. Its totient is φ = 20093577154560.

The previous prime is 21321210203303. The next prime is 21321210203317. The reversal of 21321210203311 is 11330201212312.

It is a cyclic number.

It is not a de Polignac number, because 21321210203311 - 2³ = 21321210203303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321210203317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104014741 + ... + 104219521.

It is an arithmetic number, because the mean of its divisors is an integer number (1410035676190).

Almost surely, 2^{21321210203311} is an apocalyptic number.

21321210203311 is a deficient number, since it is larger than the sum of its proper divisors (1239360615729).

21321210203311 is a wasteful number, since it uses less digits than its factorization.

21321210203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233386.

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

Adding to 21321210203311 its reverse (11330201212312), we get a palindrome (32651411415623).

The spelling of 21321210203311 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred ten million, two hundred three thousand, three hundred eleven".