21003100101312 has 56 divisors (see below), whose sum is σ = 63509374119936. Its totient is φ = 6000885742848.

The previous prime is 21003100101311. The next prime is 21003100101323. The reversal of 21003100101312 is 21310100130012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×21003100101312² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003100101291 and 21003100101300.

It is not an unprimeable number, because it can be changed into a prime (21003100101311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813651968 + ... + 7813654655.

Almost surely, 2^{21003100101312} is an apocalyptic number.

It is an amenable number.

21003100101312 is an abundant number, since it is smaller than the sum of its proper divisors (42506274018624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21003100101312 is a wasteful number, since it uses less digits than its factorization.

21003100101312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15627306645 (or 15627306635 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21003100101312 its reverse (21310100130012), we get a palindrome (42313200231324).

The spelling of 21003100101312 in words is "twenty-one trillion, three billion, one hundred million, one hundred one thousand, three hundred twelve".