1100220121201 has 4 divisors (see below), whose sum is σ = 1138158746100. Its totient is φ = 1062281496304.

The previous prime is 1100220121171. The next prime is 1100220121207. The reversal of 1100220121201 is 1021210220011.

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 826899235600 + 273320885601 = 909340^2 + 522801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100220121201 - 2²³ = 1100211732593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100220121207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18969312406 + ... + 18969312463.

It is an arithmetic number, because the mean of its divisors is an integer number (284539686525).

Almost surely, 2^{1100220121201} is an apocalyptic number.

It is an amenable number.

1100220121201 is a deficient number, since it is larger than the sum of its proper divisors (37938624899).

1100220121201 is an equidigital number, since it uses as much as digits as its factorization.

1100220121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37938624898.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1100220121201 its reverse (1021210220011), we get a palindrome (2121430341212).

The spelling of 1100220121201 in words is "one trillion, one hundred billion, two hundred twenty million, one hundred twenty-one thousand, two hundred one".