21130223012 has 24 divisors (see below), whose sum is σ = 37357022976. Its totient is φ = 10457048448.

The previous prime is 21130222999. The next prime is 21130223063. The reversal of 21130223012 is 21032203112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296453 + ... + 360755.

It is an arithmetic number, because the mean of its divisors is an integer number (1556542624).

Almost surely, 2^21130223012 is an apocalyptic number.

It is an amenable number.

21130223012 is a deficient number, since it is larger than the sum of its proper divisors (16226799964).

21130223012 is a wasteful number, since it uses less digits than its factorization.

21130223012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65147 (or 65145 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21130223012 its reverse (21032203112), we get a palindrome (42162426124).

The spelling of 21130223012 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, twelve".