220121122211 has 2 divisors, whose sum is σ = 220121122212. Its totient is φ = 220121122210.

The previous prime is 220121122183. The next prime is 220121122231. The reversal of 220121122211 is 112221121022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220121122211 - 2⁶ = 220121122147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220121122211.

It is not a weakly prime, because it can be changed into another prime (220121122231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060561105 + 110060561106.

It is an arithmetic number, because the mean of its divisors is an integer number (110060561106).

Almost surely, 2^220121122211 is an apocalyptic number.

220121122211 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121122211 is an equidigital number, since it uses as much as digits as its factorization.

220121122211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220121122211 its reverse (112221121022), we get a palindrome (332342243233).

The spelling of 220121122211 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".