21200331311 has 2 divisors, whose sum is σ = 21200331312. Its totient is φ = 21200331310.

The previous prime is 21200331301. The next prime is 21200331319. The reversal of 21200331311 is 11313300212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200331311 - 2⁶ = 21200331247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21200331311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200331319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600165655 + 10600165656.

It is an arithmetic number, because the mean of its divisors is an integer number (10600165656).

Almost surely, 2^21200331311 is an apocalyptic number.

21200331311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200331311 is an equidigital number, since it uses as much as digits as its factorization.

21200331311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21200331311 its reverse (11313300212), we get a palindrome (32513631523).

The spelling of 21200331311 in words is "twenty-one billion, two hundred million, three hundred thirty-one thousand, three hundred eleven".