220212121211 has 2 divisors, whose sum is σ = 220212121212. Its totient is φ = 220212121210.

The previous prime is 220212121133. The next prime is 220212121237. The reversal of 220212121211 is 112121212022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220212121211 - 2²² = 220207926907 is a prime.

It is a super-2 number, since 2×220212121211² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220212121211.

It is not a weakly prime, because it can be changed into another prime (220212123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110106060605 + 110106060606.

It is an arithmetic number, because the mean of its divisors is an integer number (110106060606).

Almost surely, 2^220212121211 is an apocalyptic number.

220212121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

220212121211 is an equidigital number, since it uses as much as digits as its factorization.

220212121211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 220212121211 its reverse (112121212022), we get a palindrome (332333333233).

The spelling of 220212121211 in words is "two hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".