11211202231 has 2 divisors, whose sum is σ = 11211202232. Its totient is φ = 11211202230.

The previous prime is 11211202229. The next prime is 11211202253. The reversal of 11211202231 is 13220211211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211202231 - 2¹ = 11211202229 is a prime.

It is a super-2 number, since 2×11211202231² (a number of 21 digits) contains 22 as substring.

Together with 11211202229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211202931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605601115 + 5605601116.

It is an arithmetic number, because the mean of its divisors is an integer number (5605601116).

Almost surely, 2^11211202231 is an apocalyptic number.

11211202231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211202231 is an equidigital number, since it uses as much as digits as its factorization.

11211202231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11211202231 its reverse (13220211211), we get a palindrome (24431413442).

The spelling of 11211202231 in words is "eleven billion, two hundred eleven million, two hundred two thousand, two hundred thirty-one".