111202111212 has 24 divisors (see below), whose sum is σ = 260436178800. Its totient is φ = 36929572416.

The previous prime is 111202111193. The next prime is 111202111253. The reversal of 111202111212 is 212111202111.

It is a happy number.

It is a super-2 number, since 2×111202111212² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111202111191 and 111202111200.

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 in 7 ways as a sum of consecutive naturals, for example, 17221387 + ... + 17227842.

It is an arithmetic number, because the mean of its divisors is an integer number (10851507450).

Almost surely, 2^111202111212 is an apocalyptic number.

111202111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111202111212 is an abundant number, since it is smaller than the sum of its proper divisors (149234067588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111202111212 is a wasteful number, since it uses less digits than its factorization.

111202111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34449505 (or 34449503 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111202111212 its reverse (212111202111), we get a palindrome (323313313323).

It can be divided in two parts, 111202111 and 212, that multiplied together give a palindrome (23574847532).

The spelling of 111202111212 in words is "one hundred eleven billion, two hundred two million, one hundred eleven thousand, two hundred twelve".