111121120005 has 32 divisors (see below), whose sum is σ = 206523948288. Its totient is φ = 49965465600.

The previous prime is 111121120001. The next prime is 111121120051. The reversal of 111121120005 is 500021121111.

It is not a de Polignac number, because 111121120005 - 2² = 111121120001 is a prime.

It is a super-2 number, since 2×111121120005² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121120001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8668156 + ... + 8680965.

It is an arithmetic number, because the mean of its divisors is an integer number (6453873384).

Almost surely, 2^111121120005 is an apocalyptic number.

111121120005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111121120005 is a deficient number, since it is larger than the sum of its proper divisors (95402828283).

111121120005 is a wasteful number, since it uses less digits than its factorization.

111121120005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17349197.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 111121120005 its reverse (500021121111), we get a palindrome (611142241116).

The spelling of 111121120005 in words is "one hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, five".