111021201005 has 32 divisors (see below), whose sum is σ = 156919351680. Its totient is φ = 74339930880.

The previous prime is 111021200993. The next prime is 111021201007. The reversal of 111021201005 is 500102120111.

It is not a de Polignac number, because 111021201005 - 2¹⁰ = 111021199981 is a prime.

It is a super-2 number, since 2×111021201005² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021201007) 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 31 ways as a sum of consecutive naturals, for example, 78554 + ... + 477716.

It is an arithmetic number, because the mean of its divisors is an integer number (4903729740).

Almost surely, 2^111021201005 is an apocalyptic number.

It is an amenable number.

111021201005 is a deficient number, since it is larger than the sum of its proper divisors (45898150675).

111021201005 is a wasteful number, since it uses less digits than its factorization.

111021201005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399581.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 111021201005 its reverse (500102120111), we get a palindrome (611123321116).

The spelling of 111021201005 in words is "one hundred eleven billion, twenty-one million, two hundred one thousand, five".