21021110112101 has 8 divisors (see below), whose sum is σ = 23222400124800. Its totient is φ = 18868200099840.

The previous prime is 21021110112091. The next prime is 21021110112157. The reversal of 21021110112101 is 10121101112012.

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 21021110112101 - 2²⁶ = 21021043003237 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 (21021110112601) 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, 12094999196 + ... + 12095000933.

It is an arithmetic number, because the mean of its divisors is an integer number (2902800015600).

Almost surely, 2^{21021110112101} is an apocalyptic number.

It is an amenable number.

21021110112101 is a deficient number, since it is larger than the sum of its proper divisors (2201290012699).

21021110112101 is a wasteful number, since it uses less digits than its factorization.

21021110112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24190000219.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21021110112101 its reverse (10121101112012), we get a palindrome (31142211224113).

The spelling of 21021110112101 in words is "twenty-one trillion, twenty-one billion, one hundred ten million, one hundred twelve thousand, one hundred one".