1101111221201 has 2 divisors, whose sum is σ = 1101111221202. Its totient is φ = 1101111221200.

The previous prime is 1101111221191. The next prime is 1101111221261. The reversal of 1101111221201 is 1021221111011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840448897600 + 260662323601 = 916760^2 + 510551^2 .

It is an emirp because it is prime and its reverse (1021221111011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101111221201 - 2¹⁰ = 1101111220177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101111221261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550555610600 + 550555610601.

It is an arithmetic number, because the mean of its divisors is an integer number (550555610601).

Almost surely, 2^{1101111221201} is an apocalyptic number.

It is an amenable number.

1101111221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101111221201 is an equidigital number, since it uses as much as digits as its factorization.

1101111221201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1101111221201 its reverse (1021221111011), we get a palindrome (2122332332212).

The spelling of 1101111221201 in words is "one trillion, one hundred one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred one".