1101223121213 has 4 divisors (see below), whose sum is σ = 1102551497340. Its totient is φ = 1099894745088.

The previous prime is 1101223121171. The next prime is 1101223121227. The reversal of 1101223121213 is 3121213221011.

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 454866615844 + 646356505369 = 674438^2 + 803963^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101223121213 - 2²⁸ = 1100954685757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101223121513) 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, 664186820 + ... + 664188477.

It is an arithmetic number, because the mean of its divisors is an integer number (275637874335).

Almost surely, 2^{1101223121213} is an apocalyptic number.

It is an amenable number.

1101223121213 is a deficient number, since it is larger than the sum of its proper divisors (1328376127).

1101223121213 is an equidigital number, since it uses as much as digits as its factorization.

1101223121213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328376126.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1101223121213 its reverse (3121213221011), we get a palindrome (4222436342224).

The spelling of 1101223121213 in words is "one trillion, one hundred one billion, two hundred twenty-three million, one hundred twenty-one thousand, two hundred thirteen".