2210212421 has 2 divisors, whose sum is σ = 2210212422. Its totient is φ = 2210212420.

The previous prime is 2210212399. The next prime is 2210212457. The reversal of 2210212421 is 1242120122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2050821796 + 159390625 = 45286^2 + 12625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210212421 - 2¹⁰ = 2210211397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2210212421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2210212621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105106210 + 1105106211.

It is an arithmetic number, because the mean of its divisors is an integer number (1105106211).

Almost surely, 2^2210212421 is an apocalyptic number.

It is an amenable number.

2210212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210212421 is an equidigital number, since it uses as much as digits as its factorization.

2210212421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2210212421 is about 47012.8963264337. The cubic root of 2210212421 is about 1302.6007935527.

Adding to 2210212421 its reverse (1242120122), we get a palindrome (3452332543).

The spelling of 2210212421 in words is "two billion, two hundred ten million, two hundred twelve thousand, four hundred twenty-one".