111212001120221 has 8 divisors (see below), whose sum is σ = 113802175036704. Its totient is φ = 108622002126960.

The previous prime is 111212001120163. The next prime is 111212001120251. The reversal of 111212001120221 is 122021100212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111212001120221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111212001120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212001120251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42444011 + ... + 44987976.

It is an arithmetic number, because the mean of its divisors is an integer number (14225271879588).

Almost surely, 2^{111212001120221} is an apocalyptic number.

It is an amenable number.

111212001120221 is a deficient number, since it is larger than the sum of its proper divisors (2590173916483).

111212001120221 is an equidigital number, since it uses as much as digits as its factorization.

111212001120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87461611.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111212001120221 its reverse (122021100212111), we get a palindrome (233233101332332).

The spelling of 111212001120221 in words is "one hundred eleven trillion, two hundred twelve billion, one million, one hundred twenty thousand, two hundred twenty-one".