111120021212 has 24 divisors (see below), whose sum is σ = 209274261840. Its totient is φ = 51434530560.

The previous prime is 111120021121. The next prime is 111120021223. The reversal of 111120021212 is 212120021111.

It is a super-2 number, since 2×111120021212² (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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13390262 + ... + 13398557.

It is an arithmetic number, because the mean of its divisors is an integer number (8719760910).

Almost surely, 2^111120021212 is an apocalyptic number.

It is an amenable number.

111120021212 is a deficient number, since it is larger than the sum of its proper divisors (98154240628).

111120021212 is a wasteful number, since it uses less digits than its factorization.

111120021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26788901 (or 26788899 counting only the distinct ones).

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

Adding to 111120021212 its reverse (212120021111), we get a palindrome (323240042323).

The spelling of 111120021212 in words is "one hundred eleven billion, one hundred twenty million, twenty-one thousand, two hundred twelve".