21011100002102 has 32 divisors (see below), whose sum is σ = 36311418823680. Its totient is φ = 8931766386240.

The previous prime is 21011100002059. The next prime is 21011100002107. The reversal of 21011100002102 is 20120000111012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011100002107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2088452 + ... + 6810567.

It is an arithmetic number, because the mean of its divisors is an integer number (1134731838240).

Almost surely, 2^{21011100002102} is an apocalyptic number.

21011100002102 is a deficient number, since it is larger than the sum of its proper divisors (15300318821578).

21011100002102 is a wasteful number, since it uses less digits than its factorization.

21011100002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900396.

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

Adding to 21011100002102 its reverse (20120000111012), we get a palindrome (41131100113114).

The spelling of 21011100002102 in words is "twenty-one trillion, eleven billion, one hundred million, two thousand, one hundred two".