1001221202011 has 2 divisors, whose sum is σ = 1001221202012. Its totient is φ = 1001221202010.

The previous prime is 1001221201987. The next prime is 1001221202027. The reversal of 1001221202011 is 1102021221001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001221202011 - 2¹⁷ = 1001221070939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001221201982 and 1001221202000.

It is not a weakly prime, because it can be changed into another prime (1001221202411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610601005 + 500610601006.

It is an arithmetic number, because the mean of its divisors is an integer number (500610601006).

Almost surely, 2^{1001221202011} is an apocalyptic number.

1001221202011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221202011 is an equidigital number, since it uses as much as digits as its factorization.

1001221202011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1001221202011 its reverse (1102021221001), we get a palindrome (2103242423012).

The spelling of 1001221202011 in words is "one trillion, one billion, two hundred twenty-one million, two hundred two thousand, eleven".