21311332332203 has 2 divisors, whose sum is σ = 21311332332204. Its totient is φ = 21311332332202.

The previous prime is 21311332332197. The next prime is 21311332332239. The reversal of 21311332332203 is 30223323311312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21311332332203 - 2⁴ = 21311332332187 is a prime.

It is not a weakly prime, because it can be changed into another prime (21311332332263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655666166101 + 10655666166102.

It is an arithmetic number, because the mean of its divisors is an integer number (10655666166102).

Almost surely, 2^{21311332332203} is an apocalyptic number.

21311332332203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21311332332203 is an equidigital number, since it uses as much as digits as its factorization.

21311332332203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 21311332332203 its reverse (30223323311312), we get a palindrome (51534655643515).

The spelling of 21311332332203 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirty-two million, three hundred thirty-two thousand, two hundred three".