21303130223129 has 4 divisors (see below), whose sum is σ = 21310483740084. Its totient is φ = 21295776706176.

The previous prime is 21303130223033. The next prime is 21303130223147. The reversal of 21303130223129 is 92132203130312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5488351054729 + 15814779168400 = 2342723^2 + 3976780^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303130223129 - 2⁸ = 21303130222873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21303130223095 and 21303130223104.

It is not an unprimeable number, because it can be changed into a prime (21303130223159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676754132 + ... + 3676759925.

It is an arithmetic number, because the mean of its divisors is an integer number (5327620935021).

Almost surely, 2^{21303130223129} is an apocalyptic number.

It is an amenable number.

21303130223129 is a deficient number, since it is larger than the sum of its proper divisors (7353516955).

21303130223129 is an equidigital number, since it uses as much as digits as its factorization.

21303130223129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7353516954.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 21303130223129 in words is "twenty-one trillion, three hundred three billion, one hundred thirty million, two hundred twenty-three thousand, one hundred twenty-nine".