21102001022101 has 8 divisors (see below), whose sum is σ = 21456372317184. Its totient is φ = 20750570568000.

The previous prime is 21102001022077. The next prime is 21102001022129. The reversal of 21102001022101 is 10122010020112.

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 21102001022101 - 2¹⁷ = 21102000891029 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 (21102001022161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735195775 + ... + 735224476.

It is an arithmetic number, because the mean of its divisors is an integer number (2682046539648).

Almost surely, 2^{21102001022101} is an apocalyptic number.

It is an amenable number.

21102001022101 is a deficient number, since it is larger than the sum of its proper divisors (354371295083).

21102001022101 is a wasteful number, since it uses less digits than its factorization.

21102001022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470420491.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102001022101 its reverse (10122010020112), we get a palindrome (31224011042213).

The spelling of 21102001022101 in words is "twenty-one trillion, one hundred two billion, one million, twenty-two thousand, one hundred one".