1211120211103 has 48 divisors (see below), whose sum is σ = 1415464872192. Its totient is φ = 1031906304000.

The previous prime is 1211120211097. The next prime is 1211120211139. The reversal of 1211120211103 is 3011120211121.

It is a happy number.

It is not a de Polignac number, because 1211120211103 - 2¹³ = 1211120202911 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 (1211120211143) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 772890226 + ... + 772891792.

It is an arithmetic number, because the mean of its divisors is an integer number (29488851504).

Almost surely, 2^{1211120211103} is an apocalyptic number.

1211120211103 is a deficient number, since it is larger than the sum of its proper divisors (204344661089).

1211120211103 is a wasteful number, since it uses less digits than its factorization.

1211120211103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2944 (or 2933 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1211120211103 its reverse (3011120211121), we get a palindrome (4222240422224).

The spelling of 1211120211103 in words is "one trillion, two hundred eleven billion, one hundred twenty million, two hundred eleven thousand, one hundred three".