21212022127 has 2 divisors, whose sum is σ = 21212022128. Its totient is φ = 21212022126.

The previous prime is 21212022071. The next prime is 21212022133. The reversal of 21212022127 is 72122021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212022127 - 2²³ = 21203633519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21212022098 and 21212022107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212022137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606011063 + 10606011064.

It is an arithmetic number, because the mean of its divisors is an integer number (10606011064).

Almost surely, 2^21212022127 is an apocalyptic number.

21212022127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212022127 is an equidigital number, since it uses as much as digits as its factorization.

21212022127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 21212022127 its reverse (72122021212), we get a palindrome (93334043339).

The spelling of 21212022127 in words is "twenty-one billion, two hundred twelve million, twenty-two thousand, one hundred twenty-seven".