214211021 has 2 divisors, whose sum is σ = 214211022. Its totient is φ = 214211020.

The previous prime is 214211003. The next prime is 214211059. The reversal of 214211021 is 120112412.

It is a happy number.

214211021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190053796 + 24157225 = 13786^2 + 4915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-214211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214210987 and 214211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214211821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107105510 + 107105511.

It is an arithmetic number, because the mean of its divisors is an integer number (107105511).

Almost surely, 2^214211021 is an apocalyptic number.

It is an amenable number.

214211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

214211021 is an equidigital number, since it uses as much as digits as its factorization.

214211021 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 214211021 is about 14635.9496104626. The cubic root of 214211021 is about 598.3389436931.

Adding to 214211021 its reverse (120112412), we get a palindrome (334323433).

The spelling of 214211021 in words is "two hundred fourteen million, two hundred eleven thousand, twenty-one".