21000200012 has 36 divisors (see below), whose sum is σ = 41787972240. Its totient is φ = 9216382560.

The previous prime is 21000200009. The next prime is 21000200051.

21000200012 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 734048 + ... + 762119.

Almost surely, 2^21000200012 is an apocalyptic number.

21000200012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000200012 is a deficient number, since it is larger than the sum of its proper divisors (20787772228).

21000200012 is a wasteful number, since it uses less digits than its factorization.

21000200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496222 (or 1496209 counting only the distinct ones).

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

The spelling of 21000200012 in words is "twenty-one billion, two hundred thousand, twelve".