21311114121203 has 2 divisors, whose sum is σ = 21311114121204. Its totient is φ = 21311114121202.

The previous prime is 21311114121131. The next prime is 21311114121221. The reversal of 21311114121203 is 30212141111312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21311114121203 - 2¹⁸ = 21311113859059 is a prime.

It is not a weakly prime, because it can be changed into another prime (21311114121263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655557060601 + 10655557060602.

It is an arithmetic number, because the mean of its divisors is an integer number (10655557060602).

Almost surely, 2^{21311114121203} is an apocalyptic number.

21311114121203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21311114121203 is an equidigital number, since it uses as much as digits as its factorization.

21311114121203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 21311114121203 its reverse (30212141111312), we get a palindrome (51523255232515).

The spelling of 21311114121203 in words is "twenty-one trillion, three hundred eleven billion, one hundred fourteen million, one hundred twenty-one thousand, two hundred three".