21101010000002 has 4 divisors (see below), whose sum is σ = 31651515000006. Its totient is φ = 10550505000000.

The previous prime is 21101009999969. The next prime is 21101010000029. The reversal of 21101010000002 is 20000001010112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14606315756041 + 6494694243961 = 3821821^2 + 2548469^2 .

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 as a sum of consecutive naturals, namely, 5275252499999 + ... + 5275252500002.

Almost surely, 2^{21101010000002} is an apocalyptic number.

21101010000002 is a deficient number, since it is larger than the sum of its proper divisors (10550505000004).

21101010000002 is a wasteful number, since it uses less digits than its factorization.

21101010000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10550505000003.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21101010000002 its reverse (20000001010112), we get a palindrome (41101011010114).

The spelling of 21101010000002 in words is "twenty-one trillion, one hundred one billion, ten million, two", and thus it is an aban number.