21011100012002 has 16 divisors (see below), whose sum is σ = 32534048950272. Its totient is φ = 10166432295360.

The previous prime is 21011100011977. The next prime is 21011100012013. The reversal of 21011100012002 is 20021000111012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025618 + ... + 6563085.

It is an arithmetic number, because the mean of its divisors is an integer number (2033378059392).

Almost surely, 2^{21011100012002} is an apocalyptic number.

21011100012002 is a deficient number, since it is larger than the sum of its proper divisors (11522948938270).

21011100012002 is a wasteful number, since it uses less digits than its factorization.

21011100012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633393.

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

Adding to 21011100012002 its reverse (20021000111012), we get a palindrome (41032100123014).

The spelling of 21011100012002 in words is "twenty-one trillion, eleven billion, one hundred million, twelve thousand, two".