1220120212211 has 2 divisors, whose sum is σ = 1220120212212. Its totient is φ = 1220120212210.

The previous prime is 1220120212183. The next prime is 1220120212229. The reversal of 1220120212211 is 1122120210221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220120212211 - 2²² = 1220116017907 is a prime.

It is a super-4 number, since 4×1220120212211⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220120212211.

It is not a weakly prime, because it can be changed into another prime (1220120212231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610060106105 + 610060106106.

It is an arithmetic number, because the mean of its divisors is an integer number (610060106106).

Almost surely, 2^{1220120212211} is an apocalyptic number.

1220120212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120212211 is an equidigital number, since it uses as much as digits as its factorization.

1220120212211 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 1220120212211 its reverse (1122120210221), we get a palindrome (2342240422432).

The spelling of 1220120212211 in words is "one trillion, two hundred twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred eleven".