21230313111 has 40 divisors (see below), whose sum is σ = 36741628704. Its totient is φ = 11965397760.

The previous prime is 21230313109. The next prime is 21230313113. The reversal of 21230313111 is 11131303212.

21230313111 is a `hidden beast` number, since 212 + 30 + 313 + 111 = 666.

It is an interprime number because it is at equal distance from previous prime (21230313109) and next prime (21230313113).

It is not a de Polignac number, because 21230313111 - 2¹ = 21230313109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230313113) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 215070 + ... + 297851.

Almost surely, 2^21230313111 is an apocalyptic number.

21230313111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21230313111 is a deficient number, since it is larger than the sum of its proper divisors (15511315593).

21230313111 is an equidigital number, since it uses as much as digits as its factorization.

21230313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513013 (or 513004 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21230313111 its reverse (11131303212), we get a palindrome (32361616323).

The spelling of 21230313111 in words is "twenty-one billion, two hundred thirty million, three hundred thirteen thousand, one hundred eleven".