21011101010102 has 48 divisors (see below), whose sum is σ = 38338865920512. Its totient is φ = 8594642826000.

The previous prime is 21011101010089. The next prime is 21011101010173. The reversal of 21011101010102 is 20101010111012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9023024 + ... + 11110227.

It is an arithmetic number, because the mean of its divisors is an integer number (798726373344).

Almost surely, 2^{21011101010102} is an apocalyptic number.

21011101010102 is a deficient number, since it is larger than the sum of its proper divisors (17327764910410).

21011101010102 is a wasteful number, since it uses less digits than its factorization.

21011101010102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20133753 (or 20133746 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21011101010102 its reverse (20101010111012), we get a palindrome (41112111121114).

The spelling of 21011101010102 in words is "twenty-one trillion, eleven billion, one hundred one million, ten thousand, one hundred two".