21231231013103 has 2 divisors, whose sum is σ = 21231231013104. Its totient is φ = 21231231013102.

The previous prime is 21231231013081. The next prime is 21231231013121. The reversal of 21231231013103 is 30131013213212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21231231013103 - 2²² = 21231226818799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21231231015103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615615506551 + 10615615506552.

It is an arithmetic number, because the mean of its divisors is an integer number (10615615506552).

Almost surely, 2^{21231231013103} is an apocalyptic number.

21231231013103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21231231013103 is an equidigital number, since it uses as much as digits as its factorization.

21231231013103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21231231013103 its reverse (30131013213212), we get a palindrome (51362244226315).

The spelling of 21231231013103 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, thirteen thousand, one hundred three".