11111011111201 has 4 divisors (see below), whose sum is σ = 11111605969600. Its totient is φ = 11110416252804.

The previous prime is 11111011111199. The next prime is 11111011111217. The reversal of 11111011111201 is 10211111011111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11111011111201 - 2¹ = 11111011111199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111011111301) 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, 297401181 + ... + 297438538.

It is an arithmetic number, because the mean of its divisors is an integer number (2777901492400).

Almost surely, 2^{11111011111201} is an apocalyptic number.

It is an amenable number.

11111011111201 is a deficient number, since it is larger than the sum of its proper divisors (594858399).

11111011111201 is an equidigital number, since it uses as much as digits as its factorization.

11111011111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594858398.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 11111011111201 its reverse (10211111011111), we get a palindrome (21322122122312).

The spelling of 11111011111201 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, two hundred one".