111121212001222 has 4 divisors (see below), whose sum is σ = 166681818001836. Its totient is φ = 55560606000610.

The previous prime is 111121212001187. The next prime is 111121212001243. The reversal of 111121212001222 is 222100212121111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 111121212001222.

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, 27780303000304 + ... + 27780303000307.

It is an arithmetic number, because the mean of its divisors is an integer number (41670454500459).

Almost surely, 2^{111121212001222} is an apocalyptic number.

111121212001222 is a deficient number, since it is larger than the sum of its proper divisors (55560606000614).

111121212001222 is an equidigital number, since it uses as much as digits as its factorization.

111121212001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560606000613.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111121212001222 its reverse (222100212121111), we get a palindrome (333221424122333).

The spelling of 111121212001222 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, one thousand, two hundred twenty-two".