221220202112011 has 2 divisors, whose sum is σ = 221220202112012. Its totient is φ = 221220202112010.

The previous prime is 221220202112003. The next prime is 221220202112017. The reversal of 221220202112011 is 110211202022122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221220202112011 - 2³ = 221220202112003 is a prime.

It is a super-2 number, since 2×221220202112011² (a number of 29 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 221220202112011.

It is not a weakly prime, because it can be changed into another prime (221220202112017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610101056005 + 110610101056006.

It is an arithmetic number, because the mean of its divisors is an integer number (110610101056006).

Almost surely, 2^{221220202112011} is an apocalyptic number.

221220202112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220202112011 is an equidigital number, since it uses as much as digits as its factorization.

221220202112011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221220202112011 its reverse (110211202022122), we get a palindrome (331431404134133).

The spelling of 221220202112011 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred twelve thousand, eleven".