1101220111201 has 4 divisors (see below), whose sum is σ = 1258537269952. Its totient is φ = 943902952452.

The previous prime is 1101220111139. The next prime is 1101220111261. The reversal of 1101220111201 is 1021110221011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1101220111201 - 2²¹ = 1101218014049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101220111261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78658579365 + ... + 78658579378.

It is an arithmetic number, because the mean of its divisors is an integer number (314634317488).

Almost surely, 2^{1101220111201} is an apocalyptic number.

It is an amenable number.

1101220111201 is a deficient number, since it is larger than the sum of its proper divisors (157317158751).

1101220111201 is an equidigital number, since it uses as much as digits as its factorization.

1101220111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157317158750.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1101220111201 its reverse (1021110221011), we get a palindrome (2122330332212).

The spelling of 1101220111201 in words is "one trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, two hundred one".