11111202231 has 16 divisors (see below), whose sum is σ = 15233820000. Its totient is φ = 7198512768.

The previous prime is 11111202229. The next prime is 11111202233. The reversal of 11111202231 is 13220211111.

It is an interprime number because it is at equal distance from previous prime (11111202229) and next prime (11111202233).

It is not a de Polignac number, because 11111202231 - 2¹ = 11111202229 is a prime.

It is a super-2 number, since 2×11111202231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11111202231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111202233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31645 + ... + 152393.

It is an arithmetic number, because the mean of its divisors is an integer number (952113750).

Almost surely, 2^11111202231 is an apocalyptic number.

11111202231 is a deficient number, since it is larger than the sum of its proper divisors (4122617769).

11111202231 is a wasteful number, since it uses less digits than its factorization.

11111202231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121618.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11111202231 its reverse (13220211111), we get a palindrome (24331413342).

The spelling of 11111202231 in words is "eleven billion, one hundred eleven million, two hundred two thousand, two hundred thirty-one".