21127106 has 64 divisors (see below), whose sum is σ = 43497216. Its totient is φ = 7430400.

The previous prime is 21127097. The next prime is 21127121. The reversal of 21127106 is 60172112.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122036 + ... + 122208.

It is an arithmetic number, because the mean of its divisors is an integer number (679644).

Almost surely, 2^21127106 is an apocalyptic number.

21127106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21127106 is an abundant number, since it is smaller than the sum of its proper divisors (22370110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21127106 is a wasteful number, since it uses less digits than its factorization.

21127106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 21127106 is about 4596.4231746000. The cubic root of 21127106 is about 276.4479266507.

Adding to 21127106 its reverse (60172112), we get a palindrome (81299218).

The spelling of 21127106 in words is "twenty-one million, one hundred twenty-seven thousand, one hundred six".