111212202222111 has 4 divisors (see below), whose sum is σ = 148282936296152. Its totient is φ = 74141468148072.

The previous prime is 111212202222101. The next prime is 111212202222119. The reversal of 111212202222111 is 111222202212111.

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

It is not a de Polignac number, because 111212202222111 - 2²² = 111212198027807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212202222119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18535367037016 + ... + 18535367037021.

It is an arithmetic number, because the mean of its divisors is an integer number (37070734074038).

Almost surely, 2^{111212202222111} is an apocalyptic number.

111212202222111 is a deficient number, since it is larger than the sum of its proper divisors (37070734074041).

111212202222111 is an equidigital number, since it uses as much as digits as its factorization.

111212202222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37070734074040.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111212202222111 its reverse (111222202212111), we get a palindrome (222434404434222).

The spelling of 111212202222111 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred two million, two hundred twenty-two thousand, one hundred eleven".