21101200012 has 6 divisors (see below), whose sum is σ = 36927100028. Its totient is φ = 10550600004.

The previous prime is 21101200007. The next prime is 21101200033. The reversal of 21101200012 is 21000210112.

It is a super-3 number, since 3×21101200012³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2637649998 + ... + 2637650005.

Almost surely, 2^21101200012 is an apocalyptic number.

It is an amenable number.

21101200012 is a deficient number, since it is larger than the sum of its proper divisors (15825900016).

21101200012 is a wasteful number, since it uses less digits than its factorization.

21101200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275300007 (or 5275300005 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21101200012 its reverse (21000210112), we get a palindrome (42101410124).

The spelling of 21101200012 in words is "twenty-one billion, one hundred one million, two hundred thousand, twelve".