111212231201 has 12 divisors (see below), whose sum is σ = 118863773712. Its totient is φ = 104028141888.

The previous prime is 111212231153. The next prime is 111212231203. The reversal of 111212231201 is 102132212111.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-111212231201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212231201.

It is not an unprimeable number, because it can be changed into a prime (111212231203) 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 in 11 ways as a sum of consecutive naturals, for example, 1133315 + ... + 1227528.

It is an arithmetic number, because the mean of its divisors is an integer number (9905314476).

Almost surely, 2^111212231201 is an apocalyptic number.

It is an amenable number.

111212231201 is a deficient number, since it is larger than the sum of its proper divisors (7651542511).

111212231201 is a wasteful number, since it uses less digits than its factorization.

111212231201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361040 (or 2361023 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111212231201 its reverse (102132212111), we get a palindrome (213344443312).

The spelling of 111212231201 in words is "one hundred eleven billion, two hundred twelve million, two hundred thirty-one thousand, two hundred one".