21053127 has 16 divisors (see below), whose sum is σ = 28643328. Its totient is φ = 13752000.

The previous prime is 21053117. The next prime is 21053129. The reversal of 21053127 is 72135012.

It is not a de Polignac number, because 21053127 - 2⁶ = 21053063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21053129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54778 + ... + 55160.

It is an arithmetic number, because the mean of its divisors is an integer number (1790208).

Almost surely, 2^21053127 is an apocalyptic number.

21053127 is a deficient number, since it is larger than the sum of its proper divisors (7590201).

21053127 is a wasteful number, since it uses less digits than its factorization.

21053127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 21053127 is about 4588.3686643512. The cubic root of 21053127 is about 276.1248778523.

Adding to 21053127 its reverse (72135012), we get a palindrome (93188139).

The spelling of 21053127 in words is "twenty-one million, fifty-three thousand, one hundred twenty-seven".