111220212212 has 6 divisors (see below), whose sum is σ = 194635371378. Its totient is φ = 55610106104.

The previous prime is 111220212203. The next prime is 111220212221. The reversal of 111220212212 is 212212022111.

It is an interprime number because it is at equal distance from previous prime (111220212203) and next prime (111220212221).

It can be written as a sum of positive squares in only one way, i.e., 62487000676 + 48733211536 = 249974^2 + 220756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902526523 + ... + 13902526530.

It is an arithmetic number, because the mean of its divisors is an integer number (32439228563).

Almost surely, 2^111220212212 is an apocalyptic number.

It is an amenable number.

111220212212 is a deficient number, since it is larger than the sum of its proper divisors (83415159166).

111220212212 is a wasteful number, since it uses less digits than its factorization.

111220212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27805053057 (or 27805053055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111220212212 its reverse (212212022111), we get a palindrome (323432234323).

The spelling of 111220212212 in words is "one hundred eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred twelve".