21003231315036 has 24 divisors (see below), whose sum is σ = 49055073750144. Its totient is φ = 6994286531440.

The previous prime is 21003231315013. The next prime is 21003231315047. The reversal of 21003231315036 is 63051313230012.

It is a super-2 number, since 2×21003231315036² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003231314994 and 21003231315012.

It is a congruent number.

It is an unprimeable number.

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, 848808810 + ... + 848833553.

It is an arithmetic number, because the mean of its divisors is an integer number (2043961406256).

Almost surely, 2^{21003231315036} is an apocalyptic number.

It is an amenable number.

21003231315036 is an abundant number, since it is smaller than the sum of its proper divisors (28051842435108).

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

21003231315036 is a wasteful number, since it uses less digits than its factorization.

21003231315036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697643401 (or 1697643399 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 21003231315036 its reverse (63051313230012), we get a palindrome (84054544545048).

The spelling of 21003231315036 in words is "twenty-one trillion, three billion, two hundred thirty-one million, three hundred fifteen thousand, thirty-six".