11111212212201 has 12 divisors (see below), whose sum is σ = 16208434977540. Its totient is φ = 7334133472800.

The previous prime is 11111212212119. The next prime is 11111212212227. The reversal of 11111212212201 is 10221221211111.

It is a happy number.

11111212212201 is a `hidden beast` number, since 111 + 112 + 1 + 221 + 220 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7306079256576 + 3805132955625 = 2702976^2 + 1950675^2 .

It is not a de Polignac number, because 11111212212201 - 2¹⁵ = 11111212179433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111212212101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6111776986 + ... + 6111778803.

It is an arithmetic number, because the mean of its divisors is an integer number (1350702914795).

Almost surely, 2^{11111212212201} is an apocalyptic number.

It is an amenable number.

11111212212201 is a deficient number, since it is larger than the sum of its proper divisors (5097222765339).

11111212212201 is a wasteful number, since it uses less digits than its factorization.

11111212212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223555896 (or 12223555893 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11111212212201 its reverse (10221221211111), we get a palindrome (21332433423312).

The spelling of 11111212212201 in words is "eleven trillion, one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, two hundred one".