21000211021012 has 12 divisors (see below), whose sum is σ = 36850506535360. Its totient is φ = 10471494868056.

The previous prime is 21000211021007. The next prime is 21000211021037. The reversal of 21000211021012 is 21012011200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000211020983 and 21000211021001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7152658962 + ... + 7152661897.

Almost surely, 2^{21000211021012} is an apocalyptic number.

It is an amenable number.

21000211021012 is a deficient number, since it is larger than the sum of its proper divisors (15850295514348).

21000211021012 is a wasteful number, since it uses less digits than its factorization.

21000211021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305321230 (or 14305321228 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000211021012 its reverse (21012011200012), we get a palindrome (42012222221024).

The spelling of 21000211021012 in words is "twenty-one trillion, two hundred eleven million, twenty-one thousand, twelve".