1101221113 has 2 divisors, whose sum is σ = 1101221114. Its totient is φ = 1101221112.

The previous prime is 1101221111. The next prime is 1101221123. The reversal of 1101221113 is 3111221011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901620729 + 199600384 = 30027^2 + 14128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101221113 - 2¹ = 1101221111 is a prime.

Together with 1101221111, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1101221093 and 1101221102.

It is not a weakly prime, because it can be changed into another prime (1101221111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550610556 + 550610557.

It is an arithmetic number, because the mean of its divisors is an integer number (550610557).

Almost surely, 2^1101221113 is an apocalyptic number.

It is an amenable number.

1101221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101221113 is an equidigital number, since it uses as much as digits as its factorization.

1101221113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1101221113 is about 33184.6517685511. The cubic root of 1101221113 is about 1032.6619531887.

Adding to 1101221113 its reverse (3111221011), we get a palindrome (4212442124).

The spelling of 1101221113 in words is "one billion, one hundred one million, two hundred twenty-one thousand, one hundred thirteen".