211214021 has 2 divisors, whose sum is σ = 211214022. Its totient is φ = 211214020.

The previous prime is 211214011. The next prime is 211214027. The reversal of 211214021 is 120412112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170433025 + 40780996 = 13055^2 + 6386^2 .

It is a cyclic number.

It is not a de Polignac number, because 211214021 - 2¹⁸ = 210951877 is a prime.

It is a super-2 number, since 2×211214021² = 89222725333976882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211213987 and 211214005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211214027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105607010 + 105607011.

It is an arithmetic number, because the mean of its divisors is an integer number (105607011).

Almost surely, 2^211214021 is an apocalyptic number.

It is an amenable number.

211214021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211214021 is an equidigital number, since it uses as much as digits as its factorization.

211214021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 211214021 is about 14533.2040858167. The cubic root of 211214021 is about 595.5353992628.

Adding to 211214021 its reverse (120412112), we get a palindrome (331626133).

The spelling of 211214021 in words is "two hundred eleven million, two hundred fourteen thousand, twenty-one".