21110231302 has 4 divisors (see below), whose sum is σ = 31665346956. Its totient is φ = 10555115650.

The previous prime is 21110231281. The next prime is 21110231309. The reversal of 21110231302 is 20313201112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110231309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277557824 + ... + 5277557827.

It is an arithmetic number, because the mean of its divisors is an integer number (7916336739).

Almost surely, 2^21110231302 is an apocalyptic number.

21110231302 is a deficient number, since it is larger than the sum of its proper divisors (10555115654).

21110231302 is a wasteful number, since it uses less digits than its factorization.

21110231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555115653.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21110231302 its reverse (20313201112), we get a palindrome (41423432414).

The spelling of 21110231302 in words is "twenty-one billion, one hundred ten million, two hundred thirty-one thousand, three hundred two".