11311112201 has 4 divisors (see below), whose sum is σ = 11802899712. Its totient is φ = 10819324692.

The previous prime is 11311112173. The next prime is 11311112221. The reversal of 11311112201 is 10221111311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10221111311 = 499 ⋅20483189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311112201 is a prime.

It is a super-2 number, since 2×11311112201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11311112221) 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, 245893721 + ... + 245893766.

It is an arithmetic number, because the mean of its divisors is an integer number (2950724928).

Almost surely, 2^11311112201 is an apocalyptic number.

It is an amenable number.

11311112201 is a deficient number, since it is larger than the sum of its proper divisors (491787511).

11311112201 is an equidigital number, since it uses as much as digits as its factorization.

11311112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491787510.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11311112201 its reverse (10221111311), we get a palindrome (21532223512).

The spelling of 11311112201 in words is "eleven billion, three hundred eleven million, one hundred twelve thousand, two hundred one".