21130334012 has 6 divisors (see below), whose sum is σ = 36978084528. Its totient is φ = 10565167004.

The previous prime is 21130334009. The next prime is 21130334047. The reversal of 21130334012 is 21043303112.

It is a super-2 number, since 2×21130334012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2641291748 + ... + 2641291755.

It is an arithmetic number, because the mean of its divisors is an integer number (6163014088).

Almost surely, 2^21130334012 is an apocalyptic number.

It is an amenable number.

21130334012 is a deficient number, since it is larger than the sum of its proper divisors (15847750516).

21130334012 is a wasteful number, since it uses less digits than its factorization.

21130334012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282583507 (or 5282583505 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21130334012 its reverse (21043303112), we get a palindrome (42173637124).

The spelling of 21130334012 in words is "twenty-one billion, one hundred thirty million, three hundred thirty-four thousand, twelve".