111212122221110 has 16 divisors (see below), whose sum is σ = 200192809062816. Its totient is φ = 44482406874048.

The previous prime is 111212122221103. The next prime is 111212122221169. The reversal of 111212122221110 is 11122221212111.

It is a happy number.

It is a super-3 number, since 3×111212122221110³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305060522 + ... + 305424861.

It is an arithmetic number, because the mean of its divisors is an integer number (12512050566426).

Almost surely, 2^{111212122221110} is an apocalyptic number.

111212122221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212122221110 is a deficient number, since it is larger than the sum of its proper divisors (88980686841706).

111212122221110 is a wasteful number, since it uses less digits than its factorization.

111212122221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610503607.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111212122221110 its reverse (11122221212111), we get a palindrome (122334343433221).

The spelling of 111212122221110 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred ten".