220220212221811 has 2 divisors, whose sum is σ = 220220212221812. Its totient is φ = 220220212221810.

The previous prime is 220220212221809. The next prime is 220220212221839. The reversal of 220220212221811 is 118122212022022.

It is a happy number.

It is an a-pointer prime, because the next prime (220220212221839) can be obtained adding 220220212221811 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220220212221811 - 2¹ = 220220212221809 is a prime.

Together with 220220212221809, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220220212221811.

It is not a weakly prime, because it can be changed into another prime (220220212228811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110106110905 + 110110106110906.

It is an arithmetic number, because the mean of its divisors is an integer number (110110106110906).

Almost surely, 2^{220220212221811} is an apocalyptic number.

220220212221811 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220212221811 is an equidigital number, since it uses as much as digits as its factorization.

220220212221811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 28.

Adding to 220220212221811 its reverse (118122212022022), we get a palindrome (338342424243833).

The spelling of 220220212221811 in words is "two hundred twenty trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, eight hundred eleven".