21310244012 has 24 divisors (see below), whose sum is σ = 37580114880. Its totient is φ = 10573146000.

The previous prime is 21310243961. The next prime is 21310244047. The reversal of 21310244012 is 21044201312.

It is a super-2 number, since 2×21310244012² (a number of 21 digits) contains 22 as substring.

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, 1243043 + ... + 1260069.

It is an arithmetic number, because the mean of its divisors is an integer number (1565838120).

Almost surely, 2^21310244012 is an apocalyptic number.

It is an amenable number.

21310244012 is a deficient number, since it is larger than the sum of its proper divisors (16269870868).

21310244012 is a wasteful number, since it uses less digits than its factorization.

21310244012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19421 (or 19419 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21310244012 its reverse (21044201312), we get a palindrome (42354445324).

The spelling of 21310244012 in words is "twenty-one billion, three hundred ten million, two hundred forty-four thousand, twelve".