1001221221023 has 2 divisors, whose sum is σ = 1001221221024. Its totient is φ = 1001221221022.

The previous prime is 1001221220999. The next prime is 1001221221047. The reversal of 1001221221023 is 3201221221001.

It is a balanced prime because it is at equal distance from previous prime (1001221220999) and next prime (1001221221047).

It is a cyclic number.

It is not a de Polignac number, because 1001221221023 - 2¹² = 1001221216927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001221220992 and 1001221221010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001221221053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610610511 + 500610610512.

It is an arithmetic number, because the mean of its divisors is an integer number (500610610512).

Almost surely, 2^{1001221221023} is an apocalyptic number.

1001221221023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001221221023 is an equidigital number, since it uses as much as digits as its factorization.

1001221221023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1001221221023 its reverse (3201221221001), we get a palindrome (4202442442024).

The spelling of 1001221221023 in words is "one trillion, one billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-three".