1221022010011 has 2 divisors, whose sum is σ = 1221022010012. Its totient is φ = 1221022010010.

The previous prime is 1221022010009. The next prime is 1221022010053. The reversal of 1221022010011 is 1100102201221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221022010011 - 2¹ = 1221022010009 is a prime.

Together with 1221022010009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1221022009973 and 1221022010000.

It is not a weakly prime, because it can be changed into another prime (1221022010111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511005005 + 610511005006.

It is an arithmetic number, because the mean of its divisors is an integer number (610511005006).

Almost surely, 2^{1221022010011} is an apocalyptic number.

1221022010011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221022010011 is an equidigital number, since it uses as much as digits as its factorization.

1221022010011 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 1221022010011 its reverse (1100102201221), we get a palindrome (2321124211232).

The spelling of 1221022010011 in words is "one trillion, two hundred twenty-one billion, twenty-two million, ten thousand, eleven".