11121010231 has 2 divisors, whose sum is σ = 11121010232. Its totient is φ = 11121010230.

The previous prime is 11121010211. The next prime is 11121010249. The reversal of 11121010231 is 13201012111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121010231 - 2¹¹ = 11121008183 is a prime.

It is a super-2 number, since 2×11121010231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121010211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560505115 + 5560505116.

It is an arithmetic number, because the mean of its divisors is an integer number (5560505116).

Almost surely, 2^11121010231 is an apocalyptic number.

11121010231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121010231 is an equidigital number, since it uses as much as digits as its factorization.

11121010231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11121010231 its reverse (13201012111), we get a palindrome (24322022342).

The spelling of 11121010231 in words is "eleven billion, one hundred twenty-one million, ten thousand, two hundred thirty-one".