1211120113 has 24 divisors (see below), whose sum is σ = 1427272704. Its totient is φ = 1024632000.

The previous prime is 1211120093. The next prime is 1211120123. The reversal of 1211120113 is 3110211121.

It is a happy number.

It is not a de Polignac number, because 1211120113 - 2¹⁷ = 1210989041 is a prime.

It is a super-2 number, since 2×1211120113² = 2933623856226265538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211120093 and 1211120102.

It is not an unprimeable number, because it can be changed into a prime (1211120123) 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 23 ways as a sum of consecutive naturals, for example, 1412781 + ... + 1413637.

It is an arithmetic number, because the mean of its divisors is an integer number (59469696).

Almost surely, 2^1211120113 is an apocalyptic number.

It is an amenable number.

1211120113 is a deficient number, since it is larger than the sum of its proper divisors (216152591).

1211120113 is a wasteful number, since it uses less digits than its factorization.

1211120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1206 counting only the distinct ones).

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

The square root of 1211120113 is about 34801.1510298151. The cubic root of 1211120113 is about 1065.9309493833.

Adding to 1211120113 its reverse (3110211121), we get a palindrome (4321331234).

The spelling of 1211120113 in words is "one billion, two hundred eleven million, one hundred twenty thousand, one hundred thirteen".