212421127 has 4 divisors (see below), whose sum is σ = 212455800. Its totient is φ = 212386456.

The previous prime is 212421119. The next prime is 212421149. The reversal of 212421127 is 721124212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212421127 - 2³ = 212421119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212421098 and 212421107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212422127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5413 + ... + 21310.

It is an arithmetic number, because the mean of its divisors is an integer number (53113950).

Almost surely, 2^212421127 is an apocalyptic number.

212421127 is a deficient number, since it is larger than the sum of its proper divisors (34673).

212421127 is an equidigital number, since it uses as much as digits as its factorization.

212421127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34672.

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

The square root of 212421127 is about 14574.6741644539. The cubic root of 212421127 is about 596.6677565530.

Adding to 212421127 its reverse (721124212), we get a palindrome (933545339).

The spelling of 212421127 in words is "two hundred twelve million, four hundred twenty-one thousand, one hundred twenty-seven".