21021200200012 has 24 divisors (see below), whose sum is σ = 39088683675216. Its totient is φ = 9857374268928.

The previous prime is 21021200200003. The next prime is 21021200200019. The reversal of 21021200200012 is 21000200212012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021200199965 and 21021200200001.

It is not an unprimeable number, because it can be changed into a prime (21021200200019) 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, 546156193 + ... + 546194680.

It is an arithmetic number, because the mean of its divisors is an integer number (1628695153134).

Almost surely, 2^{21021200200012} is an apocalyptic number.

It is an amenable number.

21021200200012 is a deficient number, since it is larger than the sum of its proper divisors (18067483475204).

21021200200012 is a wasteful number, since it uses less digits than its factorization.

21021200200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092351177 (or 1092351175 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21021200200012 its reverse (21000200212012), we get a palindrome (42021400412024).

The spelling of 21021200200012 in words is "twenty-one trillion, twenty-one billion, two hundred million, two hundred thousand, twelve".