1101111213231 has 24 divisors (see below), whose sum is σ = 1713139176320. Its totient is φ = 679265664336.

The previous prime is 1101111213131. The next prime is 1101111213289. The reversal of 1101111213231 is 1323121111011.

1101111213231 is a `hidden beast` number, since 110 + 1 + 111 + 213 + 231 = 666.

It is not a de Polignac number, because 1101111213231 - 2¹⁰ = 1101111212207 is a prime.

It is a super-2 number, since 2×1101111213231² (a number of 25 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 (1101111213131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74867611 + ... + 74882316.

Almost surely, 2^{1101111213231} is an apocalyptic number.

1101111213231 is a deficient number, since it is larger than the sum of its proper divisors (612027963089).

1101111213231 is a wasteful number, since it uses less digits than its factorization.

1101111213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149749995 (or 149749992 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1101111213231 its reverse (1323121111011), we get a palindrome (2424232324242).

The spelling of 1101111213231 in words is "one trillion, one hundred one billion, one hundred eleven million, two hundred thirteen thousand, two hundred thirty-one".