21230112103021 has 2 divisors, whose sum is σ = 21230112103022. Its totient is φ = 21230112103020.

The previous prime is 21230112102961. The next prime is 21230112103063. The reversal of 21230112103021 is 12030121103212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18938067500521 + 2292044602500 = 4351789^2 + 1513950^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230112103021 - 2¹¹ = 21230112100973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230112103021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230112103721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615056051510 + 10615056051511.

It is an arithmetic number, because the mean of its divisors is an integer number (10615056051511).

Almost surely, 2^{21230112103021} is an apocalyptic number.

It is an amenable number.

21230112103021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230112103021 is an equidigital number, since it uses as much as digits as its factorization.

21230112103021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21230112103021 its reverse (12030121103212), we get a palindrome (33260233206233).

The spelling of 21230112103021 in words is "twenty-one trillion, two hundred thirty billion, one hundred twelve million, one hundred three thousand, twenty-one".