111121121000221 has 8 divisors (see below), whose sum is σ = 111533868605880. Its totient is φ = 110708601249792.

The previous prime is 111121121000207. The next prime is 111121121000237. The reversal of 111121121000221 is 122000121121111.

It can be written as a sum of positive squares in 4 ways, for example, as 63985824784996 + 47135296215225 = 7999114^2 + 6865515^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111121121000221 - 2⁵ = 111121121000189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111121121000195 and 111121121000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121121040221) 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, 55986600 + ... + 57937393.

It is an arithmetic number, because the mean of its divisors is an integer number (13941733575735).

Almost surely, 2^{111121121000221} is an apocalyptic number.

It is an amenable number.

111121121000221 is a deficient number, since it is larger than the sum of its proper divisors (412747605659).

111121121000221 is a wasteful number, since it uses less digits than its factorization.

111121121000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113927615.

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

Adding to 111121121000221 its reverse (122000121121111), we get a palindrome (233121242121332).

The spelling of 111121121000221 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-one", and thus it is an aban number.