214120421 has 2 divisors, whose sum is σ = 214120422. Its totient is φ = 214120420.

The previous prime is 214120399. The next prime is 214120447. The reversal of 214120421 is 124021412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214036900 + 83521 = 14630^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 214120421 - 2¹⁸ = 213858277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 214120421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214120471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107060210 + 107060211.

It is an arithmetic number, because the mean of its divisors is an integer number (107060211).

Almost surely, 2^214120421 is an apocalyptic number.

It is an amenable number.

214120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

214120421 is an equidigital number, since it uses as much as digits as its factorization.

214120421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 214120421 is about 14632.8541645162. The cubic root of 214120421 is about 598.2545764923.

Adding to 214120421 its reverse (124021412), we get a palindrome (338141833).

Subtracting from 214120421 its reverse (124021412), we obtain a palindrome (90099009).

The spelling of 214120421 in words is "two hundred fourteen million, one hundred twenty thousand, four hundred twenty-one".