1113121211 has 4 divisors (see below), whose sum is σ = 1134123552. Its totient is φ = 1092118872.

The previous prime is 1113121201. The next prime is 1113121231. The reversal of 1113121211 is 1121213111.

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

It is a cyclic number.

It is not a de Polignac number, because 1113121211 - 2¹⁴ = 1113104827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113121201) 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, 10501091 + ... + 10501196.

It is an arithmetic number, because the mean of its divisors is an integer number (283530888).

Almost surely, 2^1113121211 is an apocalyptic number.

1113121211 is a deficient number, since it is larger than the sum of its proper divisors (21002341).

1113121211 is an equidigital number, since it uses as much as digits as its factorization.

1113121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002340.

The product of its digits is 12, while the sum is 14.

The square root of 1113121211 is about 33363.4712072950. The cubic root of 1113121211 is about 1036.3683771575.

Adding to 1113121211 its reverse (1121213111), we get a palindrome (2234334322).

The spelling of 1113121211 in words is "one billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred eleven".