21302101123 has 8 divisors (see below), whose sum is σ = 22506627600. Its totient is φ = 20105911008.

The previous prime is 21302101063. The next prime is 21302101127. The reversal of 21302101123 is 32110120312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21302101123 is a prime.

It is a super-2 number, since 2×21302101123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302101097 and 21302101106.

It is not an unprimeable number, because it can be changed into a prime (21302101127) 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, 2078836 + ... + 2089057.

It is an arithmetic number, because the mean of its divisors is an integer number (2813328450).

Almost surely, 2^21302101123 is an apocalyptic number.

21302101123 is a deficient number, since it is larger than the sum of its proper divisors (1204526477).

21302101123 is a wasteful number, since it uses less digits than its factorization.

21302101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168181.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21302101123 its reverse (32110120312), we get a palindrome (53412221435).

The spelling of 21302101123 in words is "twenty-one billion, three hundred two million, one hundred one thousand, one hundred twenty-three".