1001222001553 has 2 divisors, whose sum is σ = 1001222001554. Its totient is φ = 1001222001552.

The previous prime is 1001222001503. The next prime is 1001222001607. The reversal of 1001222001553 is 3551002221001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989740450449 + 11481551104 = 994857^2 + 107152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001222001553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001222001503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500611000776 + 500611000777.

It is an arithmetic number, because the mean of its divisors is an integer number (500611000777).

Almost surely, 2^{1001222001553} is an apocalyptic number.

It is an amenable number.

1001222001553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001222001553 is an equidigital number, since it uses as much as digits as its factorization.

1001222001553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 1001222001553 its reverse (3551002221001), we get a palindrome (4552224222554).

The spelling of 1001222001553 in words is "one trillion, one billion, two hundred twenty-two million, one thousand, five hundred fifty-three".