111212202005 has 4 divisors (see below), whose sum is σ = 133454642412. Its totient is φ = 88969761600.

The previous prime is 111212201983. The next prime is 111212202037. The reversal of 111212202005 is 500202212111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79678611076 + 31533590929 = 282274^2 + 177577^2 .

It is not a de Polignac number, because 111212202005 - 2¹⁴ = 111212185621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11121220196 + ... + 11121220205.

It is an arithmetic number, because the mean of its divisors is an integer number (33363660603).

Almost surely, 2^111212202005 is an apocalyptic number.

It is an amenable number.

111212202005 is a deficient number, since it is larger than the sum of its proper divisors (22242440407).

111212202005 is an equidigital number, since it uses as much as digits as its factorization.

111212202005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22242440406.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 111212202005 its reverse (500202212111), we get a palindrome (611414414116).

The spelling of 111212202005 in words is "one hundred eleven billion, two hundred twelve million, two hundred two thousand, five".