1211403242241 has 24 divisors (see below), whose sum is σ = 1759295317416. Its totient is φ = 803223889920.

The previous prime is 1211403242213. The next prime is 1211403242251. The reversal of 1211403242241 is 1422423041121.

1211403242241 is a `hidden beast` number, since 1 + 2 + 11 + 403 + 2 + 4 + 2 + 241 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26396825841 + 1185006416400 = 162471^2 + 1088580^2 .

It is not a de Polignac number, because 1211403242241 - 2⁶ = 1211403242177 is a prime.

It is a super-3 number, since 3×1211403242241³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211403242251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7305471 + ... + 7469451.

It is an arithmetic number, because the mean of its divisors is an integer number (73303971559).

Almost surely, 2^{1211403242241} is an apocalyptic number.

It is an amenable number.

1211403242241 is a deficient number, since it is larger than the sum of its proper divisors (547892075175).

1211403242241 is a wasteful number, since it uses less digits than its factorization.

1211403242241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168433 (or 168430 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 1211403242241 its reverse (1422423041121), we get a palindrome (2633826283362).

The spelling of 1211403242241 in words is "one trillion, two hundred eleven billion, four hundred three million, two hundred forty-two thousand, two hundred forty-one".