111101220212 has 6 divisors (see below), whose sum is σ = 194427135378. Its totient is φ = 55550610104.

The previous prime is 111101220173. The next prime is 111101220229. The reversal of 111101220212 is 212022101111.

It can be written as a sum of positive squares in only one way, i.e., 97446362896 + 13654857316 = 312164^2 + 116854^2 .

It is a super-2 number, since 2×111101220212² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13887652523 + ... + 13887652530.

It is an arithmetic number, because the mean of its divisors is an integer number (32404522563).

Almost surely, 2^111101220212 is an apocalyptic number.

It is an amenable number.

111101220212 is a deficient number, since it is larger than the sum of its proper divisors (83325915166).

111101220212 is a wasteful number, since it uses less digits than its factorization.

111101220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27775305057 (or 27775305055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111101220212 its reverse (212022101111), we get a palindrome (323123321323).

The spelling of 111101220212 in words is "one hundred eleven billion, one hundred one million, two hundred twenty thousand, two hundred twelve".