21011102000002 has 16 divisors (see below), whose sum is σ = 32070873317112. Its totient is φ = 10321214699520.

The previous prime is 21011101999949. The next prime is 21011102000003. The reversal of 21011102000002 is 20000020111012.

It can be written as a sum of positive squares in 4 ways, for example, as 11868031890001 + 9143070110001 = 3445001^2 + 3023751^2 .

It is not an unprimeable number, because it can be changed into a prime (21011102000003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100846783 + ... + 101054914.

Almost surely, 2^{21011102000002} is an apocalyptic number.

21011102000002 is a deficient number, since it is larger than the sum of its proper divisors (11059771317110).

21011102000002 is a wasteful number, since it uses less digits than its factorization.

21011102000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201902613.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21011102000002 its reverse (20000020111012), we get a palindrome (41011122111014).

The spelling of 21011102000002 in words is "twenty-one trillion, eleven billion, one hundred two million, two", and thus it is an aban number.