21130111102231 has 16 divisors (see below), whose sum is σ = 21841423488000. Its totient is φ = 20430599551200.

The previous prime is 21130111102183. The next prime is 21130111102241. The reversal of 21130111102231 is 13220111103112.

It is a cyclic number.

It is not a de Polignac number, because 21130111102231 - 2¹³ = 21130111094039 is a prime.

It is a super-2 number, since 2×21130111102231² (a number of 27 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 = 21130111102199 and 21130111102208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130111102241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97175970 + ... + 97393168.

It is an arithmetic number, because the mean of its divisors is an integer number (1365088968000).

Almost surely, 2^{21130111102231} is an apocalyptic number.

21130111102231 is a deficient number, since it is larger than the sum of its proper divisors (711312385769).

21130111102231 is a wasteful number, since it uses less digits than its factorization.

21130111102231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244350.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21130111102231 its reverse (13220111103112), we get a palindrome (34350222205343).

The spelling of 21130111102231 in words is "twenty-one trillion, one hundred thirty billion, one hundred eleven million, one hundred two thousand, two hundred thirty-one".