2203212421 has 2 divisors, whose sum is σ = 2203212422. Its totient is φ = 2203212420.

The previous prime is 2203212419. The next prime is 2203212437. The reversal of 2203212421 is 1242123022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2120602500 + 82609921 = 46050^2 + 9089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203212421 - 2¹ = 2203212419 is a prime.

Together with 2203212419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2203242421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101606210 + 1101606211.

It is an arithmetic number, because the mean of its divisors is an integer number (1101606211).

Almost surely, 2^2203212421 is an apocalyptic number.

It is an amenable number.

2203212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2203212421 is an equidigital number, since it uses as much as digits as its factorization.

2203212421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2203212421 is about 46938.3896293855. The cubic root of 2203212421 is about 1301.2241764486.

Adding to 2203212421 its reverse (1242123022), we get a palindrome (3445335443).

It can be divided in two parts, 22032 and 12421, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 2203212421 in words is "two billion, two hundred three million, two hundred twelve thousand, four hundred twenty-one".