111212011001221 has 8 divisors (see below), whose sum is σ = 121282816282880. Its totient is φ = 101357782177392.

The previous prime is 111212011001167. The next prime is 111212011001237. The reversal of 111212011001221 is 122100110212111.

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-111212011001221 is a prime.

It is a super-2 number, since 2×111212011001221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111212011001195 and 111212011001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212011001251) by changing a digit.

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, 54144113385 + ... + 54144115438.

It is an arithmetic number, because the mean of its divisors is an integer number (15160352035360).

Almost surely, 2^{111212011001221} is an apocalyptic number.

It is an amenable number.

111212011001221 is a deficient number, since it is larger than the sum of its proper divisors (10070805281659).

111212011001221 is a wasteful number, since it uses less digits than its factorization.

111212011001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108288228915.

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

Adding to 111212011001221 its reverse (122100110212111), we get a palindrome (233312121213332).

The spelling of 111212011001221 in words is "one hundred eleven trillion, two hundred twelve billion, eleven million, one thousand, two hundred twenty-one".