211220314427 has 2 divisors, whose sum is σ = 211220314428. Its totient is φ = 211220314426.

The previous prime is 211220314387. The next prime is 211220314471. The reversal of 211220314427 is 724413022112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220314427 - 2¹² = 211220310331 is a prime.

It is a super-3 number, since 3×211220314427³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 211220314427.

It is not a weakly prime, because it can be changed into another prime (211220314127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610157213 + 105610157214.

It is an arithmetic number, because the mean of its divisors is an integer number (105610157214).

Almost surely, 2^211220314427 is an apocalyptic number.

211220314427 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220314427 is an equidigital number, since it uses as much as digits as its factorization.

211220314427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 211220314427 its reverse (724413022112), we get a palindrome (935633336539).

The spelling of 211220314427 in words is "two hundred eleven billion, two hundred twenty million, three hundred fourteen thousand, four hundred twenty-seven".