21000002111012 has 24 divisors (see below), whose sum is σ = 39670168910400. Its totient is φ = 9697152397856.

The previous prime is 21000002110993. The next prime is 21000002111063. The reversal of 21000002111012 is 21011120000012.

It is a junction number, because it is equal to n+sod(n) for n = 21000002110984 and 21000002111002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3935529962 + ... + 3935535297.

It is an arithmetic number, because the mean of its divisors is an integer number (1652923704600).

Almost surely, 2^{21000002111012} is an apocalyptic number.

It is an amenable number.

21000002111012 is a deficient number, since it is larger than the sum of its proper divisors (18670166799388).

21000002111012 is a wasteful number, since it uses less digits than its factorization.

21000002111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7871065315 (or 7871065313 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000002111012 its reverse (21011120000012), we get a palindrome (42011122111024).

The spelling of 21000002111012 in words is "twenty-one trillion, two million, one hundred eleven thousand, twelve".