1122221121001 has 2 divisors, whose sum is σ = 1122221121002. Its totient is φ = 1122221121000.

The previous prime is 1122221120987. The next prime is 1122221121079. The reversal of 1122221121001 is 1001211222211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 847200589225 + 275020531776 = 920435^2 + 524424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122221121001 - 2⁷ = 1122221120873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122221128001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561110560500 + 561110560501.

It is an arithmetic number, because the mean of its divisors is an integer number (561110560501).

Almost surely, 2^{1122221121001} is an apocalyptic number.

It is an amenable number.

1122221121001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122221121001 is an equidigital number, since it uses as much as digits as its factorization.

1122221121001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1122221121001 its reverse (1001211222211), we get a palindrome (2123432343212).

The spelling of 1122221121001 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, one".