1100121221201 has 4 divisors (see below), whose sum is σ = 1101574486452. Its totient is φ = 1098667955952.

The previous prime is 1100121221197. The next prime is 1100121221231. The reversal of 1100121221201 is 1021221210011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312777340225 + 787343880976 = 559265^2 + 887324^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100121221201 - 2² = 1100121221197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100121221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726631490 + ... + 726633003.

It is an arithmetic number, because the mean of its divisors is an integer number (275393621613).

Almost surely, 2^{1100121221201} is an apocalyptic number.

It is an amenable number.

1100121221201 is a deficient number, since it is larger than the sum of its proper divisors (1453265251).

1100121221201 is an equidigital number, since it uses as much as digits as its factorization.

1100121221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453265250.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1100121221201 its reverse (1021221210011), we get a palindrome (2121342431212).

The spelling of 1100121221201 in words is "one trillion, one hundred billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".