21230000111 has 2 divisors, whose sum is σ = 21230000112. Its totient is φ = 21230000110.

The previous prime is 21230000107. The next prime is 21230000117. The reversal of 21230000111 is 11100003212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21230000111 - 2² = 21230000107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230000092 and 21230000101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230000117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615000055 + 10615000056.

It is an arithmetic number, because the mean of its divisors is an integer number (10615000056).

Almost surely, 2^21230000111 is an apocalyptic number.

21230000111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230000111 is an equidigital number, since it uses as much as digits as its factorization.

21230000111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21230000111 its reverse (11100003212), we get a palindrome (32330003323).

The spelling of 21230000111 in words is "twenty-one billion, two hundred thirty million, one hundred eleven", and thus it is an aban number.