21132127 has 2 divisors, whose sum is σ = 21132128. Its totient is φ = 21132126.

The previous prime is 21132119. The next prime is 21132131. The reversal of 21132127 is 72123112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21132127 - 2³ = 21132119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566063 + 10566064.

It is an arithmetic number, because the mean of its divisors is an integer number (10566064).

Almost surely, 2^21132127 is an apocalyptic number.

21132127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132127 is an equidigital number, since it uses as much as digits as its factorization.

21132127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 19.

The square root of 21132127 is about 4596.9693277202. The cubic root of 21132127 is about 276.4698248241.

Adding to 21132127 its reverse (72123112), we get a palindrome (93255239).

The spelling of 21132127 in words is "twenty-one million, one hundred thirty-two thousand, one hundred twenty-seven".