11121301231 has 8 divisors (see below), whose sum is σ = 11144758784. Its totient is φ = 11097868320.

The previous prime is 11121301211. The next prime is 11121301237. The reversal of 11121301231 is 13210312111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121301231 - 2¹¹ = 11121299183 is a prime.

It is a super-2 number, since 2×11121301231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121301237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094866 + ... + 1104976.

It is an arithmetic number, because the mean of its divisors is an integer number (1393094848).

Almost surely, 2^11121301231 is an apocalyptic number.

11121301231 is a deficient number, since it is larger than the sum of its proper divisors (23457553).

11121301231 is a wasteful number, since it uses less digits than its factorization.

11121301231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12321.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11121301231 its reverse (13210312111), we get a palindrome (24331613342).

The spelling of 11121301231 in words is "eleven billion, one hundred twenty-one million, three hundred one thousand, two hundred thirty-one".