21002003002012 has 6 divisors (see below), whose sum is σ = 36753505253528. Its totient is φ = 10501001501004.

The previous prime is 21002003001971. The next prime is 21002003002021. The reversal of 21002003002012 is 21020030020012.

It is a junction number, because it is equal to n+sod(n) for n = 21002003001983 and 21002003002001.

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, 2625250375248 + ... + 2625250375255.

Almost surely, 2^{21002003002012} is an apocalyptic number.

It is an amenable number.

21002003002012 is a deficient number, since it is larger than the sum of its proper divisors (15751502251516).

21002003002012 is a wasteful number, since it uses less digits than its factorization.

21002003002012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5250500750507 (or 5250500750505 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21002003002012 its reverse (21020030020012), we get a palindrome (42022033022024).

The spelling of 21002003002012 in words is "twenty-one trillion, two billion, three million, two thousand, twelve".