21102202112101 has 16 divisors (see below), whose sum is σ = 23099553083520. Its totient is φ = 19118041413120.

The previous prime is 21102202112099. The next prime is 21102202112107. The reversal of 21102202112101 is 10121120220112.

It is a cyclic number.

It is not a de Polignac number, because 21102202112101 - 2¹ = 21102202112099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102202112107) 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, 13994760 + ... + 15429118.

It is an arithmetic number, because the mean of its divisors is an integer number (1443722067720).

Almost surely, 2^{21102202112101} is an apocalyptic number.

It is an amenable number.

21102202112101 is a deficient number, since it is larger than the sum of its proper divisors (1997350971419).

21102202112101 is a wasteful number, since it uses less digits than its factorization.

21102202112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438956.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21102202112101 its reverse (10121120220112), we get a palindrome (31223322332213).

The spelling of 21102202112101 in words is "twenty-one trillion, one hundred two billion, two hundred two million, one hundred twelve thousand, one hundred one".