21110102101 has 16 divisors (see below), whose sum is σ = 23580108288. Its totient is φ = 18732495600.

The previous prime is 21110102077. The next prime is 21110102149. The reversal of 21110102101 is 10120101112.

It is a cyclic number.

It is not a de Polignac number, because 21110102101 - 2²⁷ = 20975884373 is a prime.

It is a super-2 number, since 2×21110102101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110102191) 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, 755856 + ... + 783286.

It is an arithmetic number, because the mean of its divisors is an integer number (1473756768).

Almost surely, 2^21110102101 is an apocalyptic number.

It is an amenable number.

21110102101 is a deficient number, since it is larger than the sum of its proper divisors (2470006187).

21110102101 is a wasteful number, since it uses less digits than its factorization.

21110102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21110102101 its reverse (10120101112), we get a palindrome (31230203213).

The spelling of 21110102101 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, one hundred one".