21102022127 has 2 divisors, whose sum is σ = 21102022128. Its totient is φ = 21102022126.

The previous prime is 21102022111. The next prime is 21102022169. The reversal of 21102022127 is 72122020112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21102022127 - 2⁴ = 21102022111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21102022099 and 21102022108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102022177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551011063 + 10551011064.

It is an arithmetic number, because the mean of its divisors is an integer number (10551011064).

Almost surely, 2^21102022127 is an apocalyptic number.

21102022127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102022127 is an equidigital number, since it uses as much as digits as its factorization.

21102022127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 21102022127 its reverse (72122020112), we get a palindrome (93224042239).

The spelling of 21102022127 in words is "twenty-one billion, one hundred two million, twenty-two thousand, one hundred twenty-seven".