21203220303311 has 2 divisors, whose sum is σ = 21203220303312. Its totient is φ = 21203220303310.

The previous prime is 21203220303301. The next prime is 21203220303323. The reversal of 21203220303311 is 11330302230212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203220303311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203220303301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601610151655 + 10601610151656.

It is an arithmetic number, because the mean of its divisors is an integer number (10601610151656).

Almost surely, 2^{21203220303311} is an apocalyptic number.

21203220303311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203220303311 is an equidigital number, since it uses as much as digits as its factorization.

21203220303311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21203220303311 its reverse (11330302230212), we get a palindrome (32533522533523).

The spelling of 21203220303311 in words is "twenty-one trillion, two hundred three billion, two hundred twenty million, three hundred three thousand, three hundred eleven".