21231201130147 has 2 divisors, whose sum is σ = 21231201130148. Its totient is φ = 21231201130146.

The previous prime is 21231201130127. The next prime is 21231201130211. The reversal of 21231201130147 is 74103110213212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21231201130147 - 2⁷ = 21231201130019 is a prime.

It is not a weakly prime, because it can be changed into another prime (21231201130127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615600565073 + 10615600565074.

It is an arithmetic number, because the mean of its divisors is an integer number (10615600565074).

Almost surely, 2^{21231201130147} is an apocalyptic number.

21231201130147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21231201130147 is an equidigital number, since it uses as much as digits as its factorization.

21231201130147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 21231201130147 its reverse (74103110213212), we get a palindrome (95334311343359).

The spelling of 21231201130147 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred one million, one hundred thirty thousand, one hundred forty-seven".