21100202101 has 8 divisors (see below), whose sum is σ = 23048659008. Its totient is φ = 19156788000.

The previous prime is 21100202059. The next prime is 21100202117. The reversal of 21100202101 is 10120200112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21100202101 - 2¹⁵ = 21100169333 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 (21100202131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251945 + ... + 1268686.

It is an arithmetic number, because the mean of its divisors is an integer number (2881082376).

Almost surely, 2^21100202101 is an apocalyptic number.

It is an amenable number.

21100202101 is a deficient number, since it is larger than the sum of its proper divisors (1948456907).

21100202101 is a wasteful number, since it uses less digits than its factorization.

21100202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521403.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21100202101 its reverse (10120200112), we get a palindrome (31220402213).

The spelling of 21100202101 in words is "twenty-one billion, one hundred million, two hundred two thousand, one hundred one".