21003010012 has 24 divisors (see below), whose sum is σ = 38008438272. Its totient is φ = 10144662000.

The previous prime is 21003009977. The next prime is 21003010019. The reversal of 21003010012 is 21001030012.

It is a super-2 number, since 2×21003010012² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003010019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80614 + ... + 220237.

It is an arithmetic number, because the mean of its divisors is an integer number (1583684928).

Almost surely, 2^21003010012 is an apocalyptic number.

It is an amenable number.

21003010012 is a deficient number, since it is larger than the sum of its proper divisors (17005428260).

21003010012 is a wasteful number, since it uses less digits than its factorization.

21003010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301449 (or 301447 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21003010012 its reverse (21001030012), we get a palindrome (42004040024).

The spelling of 21003010012 in words is "twenty-one billion, three million, ten thousand, twelve".