21031013012 has 12 divisors (see below), whose sum is σ = 36853285056. Its totient is φ = 10501503000.

The previous prime is 21031013011. The next prime is 21031013023.

21031013012 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031013011) 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 3 ways as a sum of consecutive naturals, for example, 3497498 + ... + 3503505.

It is an arithmetic number, because the mean of its divisors is an integer number (3071107088).

Almost surely, 2^21031013012 is an apocalyptic number.

It is an amenable number.

21031013012 is a deficient number, since it is larger than the sum of its proper divisors (15822272044).

21031013012 is a wasteful number, since it uses less digits than its factorization.

21031013012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001758 (or 7001756 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

It can be divided in two parts, 210310 and 13012, that added together give a palindrome (223322).

The spelling of 21031013012 in words is "twenty-one billion, thirty-one million, thirteen thousand, twelve".