212221927 has 2 divisors, whose sum is σ = 212221928. Its totient is φ = 212221926.

The previous prime is 212221909. The next prime is 212221969. The reversal of 212221927 is 729122212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212221927 - 2²³ = 203833319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212221895 and 212221904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110963 + 106110964.

It is an arithmetic number, because the mean of its divisors is an integer number (106110964).

Almost surely, 2^212221927 is an apocalyptic number.

212221927 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221927 is an equidigital number, since it uses as much as digits as its factorization.

212221927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 212221927 is about 14567.8387896077. The cubic root of 212221927 is about 596.4811878706.

The spelling of 212221927 in words is "two hundred twelve million, two hundred twenty-one thousand, nine hundred twenty-seven".