21102301111 has 8 divisors (see below), whose sum is σ = 21619640448. Its totient is φ = 20585088000.

The previous prime is 21102301091. The next prime is 21102301141. The reversal of 21102301111 is 11110320112.

It is a happy number.

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 21102301111 - 2⁵ = 21102301079 is a prime.

It is a super-2 number, since 2×21102301111² (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 = 21102301091 and 21102301100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102301141) 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, 368151 + ... + 421591.

It is an arithmetic number, because the mean of its divisors is an integer number (2702455056).

Almost surely, 2^21102301111 is an apocalyptic number.

21102301111 is a deficient number, since it is larger than the sum of its proper divisors (517339337).

21102301111 is an equidigital number, since it uses as much as digits as its factorization.

21102301111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63113.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21102301111 its reverse (11110320112), we get a palindrome (32212621223).

The spelling of 21102301111 in words is "twenty-one billion, one hundred two million, three hundred one thousand, one hundred eleven".