21013012132012 has 24 divisors (see below), whose sum is σ = 38764197967040. Its totient is φ = 9939127505040.

The previous prime is 21013012132001. The next prime is 21013012132033. The reversal of 21013012132012 is 21023121031012.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200010438 + ... + 200115469.

Almost surely, 2^{21013012132012} is an apocalyptic number.

It is an amenable number.

21013012132012 is a deficient number, since it is larger than the sum of its proper divisors (17751185835028).

21013012132012 is a wasteful number, since it uses less digits than its factorization.

21013012132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400126621 (or 400126619 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21013012132012 its reverse (21023121031012), we get a palindrome (42036133163024).

The spelling of 21013012132012 in words is "twenty-one trillion, thirteen billion, twelve million, one hundred thirty-two thousand, twelve".