21101123024101 has 8 divisors (see below), whose sum is σ = 21671499384440. Its totient is φ = 20530750650048.

The previous prime is 21101123024087. The next prime is 21101123024117. The reversal of 21101123024101 is 10142032110112.

It can be written as a sum of positive squares in 4 ways, for example, as 10733656803076 + 10367466221025 = 3276226^2 + 3219855^2 .

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

It is not a de Polignac number, because 21101123024101 - 2²⁹ = 21100586153189 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 (21101123024701) 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, 11990035 + ... + 13636831.

It is an arithmetic number, because the mean of its divisors is an integer number (2708937423055).

Almost surely, 2^{21101123024101} is an apocalyptic number.

It is an amenable number.

21101123024101 is a deficient number, since it is larger than the sum of its proper divisors (570376360339).

21101123024101 is a wasteful number, since it uses less digits than its factorization.

21101123024101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993143.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21101123024101 its reverse (10142032110112), we get a palindrome (31243155134213).

The spelling of 21101123024101 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-three million, twenty-four thousand, one hundred one".