21001200202012 has 6 divisors (see below), whose sum is σ = 36752100353528. Its totient is φ = 10500600101004.

The previous prime is 21001200202001. The next prime is 21001200202069. The reversal of 21001200202012 is 21020200210012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21001200201983 and 21001200202001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625150025248 + ... + 2625150025255.

Almost surely, 2^{21001200202012} is an apocalyptic number.

It is an amenable number.

21001200202012 is a deficient number, since it is larger than the sum of its proper divisors (15750900151516).

21001200202012 is a wasteful number, since it uses less digits than its factorization.

21001200202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250300050507 (or 5250300050505 counting only the distinct ones).

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

Adding to 21001200202012 its reverse (21020200210012), we get a palindrome (42021400412024).

The spelling of 21001200202012 in words is "twenty-one trillion, one billion, two hundred million, two hundred two thousand, twelve".