21042230012 has 24 divisors (see below), whose sum is σ = 38994633216. Its totient is φ = 9901052928.

The previous prime is 21042229997. The next prime is 21042230023. The reversal of 21042230012 is 21003224012.

It is a super-3 number, since 3×21042230012³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884708 + ... + 908180.

It is an arithmetic number, because the mean of its divisors is an integer number (1624776384).

Almost surely, 2^21042230012 is an apocalyptic number.

It is an amenable number.

21042230012 is a deficient number, since it is larger than the sum of its proper divisors (17952403204).

21042230012 is a wasteful number, since it uses less digits than its factorization.

21042230012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36677 (or 36675 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21042230012 its reverse (21003224012), we get a palindrome (42045454024).

The spelling of 21042230012 in words is "twenty-one billion, forty-two million, two hundred thirty thousand, twelve".