111221123220000 has 240 divisors, whose sum is σ = 405363922397280. Its totient is φ = 29658966048000.

The previous prime is 111221123219989. The next prime is 111221123220013. The reversal of 111221123220000 is 22321122111.

111221123220000 is a `hidden beast` number, since 1 + 11 + 221 + 1 + 232 + 200 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 102442522 + ... + 103522521.

It is an arithmetic number, because the mean of its divisors is an integer number (1689016343322).

Almost surely, 2^{111221123220000} is an apocalyptic number.

111221123220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221123220000 is an abundant number, since it is smaller than the sum of its proper divisors (294142799177280).

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

111221123220000 is an equidigital number, since it uses as much as digits as its factorization.

111221123220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205965082 (or 205965053 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111221123220000 its reverse (22321122111), we get a palindrome (111243444342111).

The spelling of 111221123220000 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-three million, two hundred twenty thousand".