21302123131303 has 16 divisors (see below), whose sum is σ = 24458556165120. Its totient is φ = 18174173695776.

The previous prime is 21302123131241. The next prime is 21302123131307. The reversal of 21302123131303 is 30313132120312.

It is not a de Polignac number, because 21302123131303 - 2⁹ = 21302123130791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302123131307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5348176 + ... + 8438437.

It is an arithmetic number, because the mean of its divisors is an integer number (1528659760320).

Almost surely, 2^{21302123131303} is an apocalyptic number.

21302123131303 is a deficient number, since it is larger than the sum of its proper divisors (3156433033817).

21302123131303 is a wasteful number, since it uses less digits than its factorization.

21302123131303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13787646.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21302123131303 its reverse (30313132120312), we get a palindrome (51615255251615).

The spelling of 21302123131303 in words is "twenty-one trillion, three hundred two billion, one hundred twenty-three million, one hundred thirty-one thousand, three hundred three".