111221111210221 has 8 divisors (see below), whose sum is σ = 111249794953088. Its totient is φ = 111192428268000.

The previous prime is 111221111210137. The next prime is 111221111210227. The reversal of 111221111210221 is 122012111122111.

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 111221111210221 - 2⁷ = 111221111210093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221111210227) 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, 360343441 + ... + 360651961.

It is an arithmetic number, because the mean of its divisors is an integer number (13906224369136).

Almost surely, 2^{111221111210221} is an apocalyptic number.

It is an amenable number.

111221111210221 is a deficient number, since it is larger than the sum of its proper divisors (28683742867).

111221111210221 is an equidigital number, since it uses as much as digits as its factorization.

111221111210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400323.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111221111210221 its reverse (122012111122111), we get a palindrome (233233222332332).

The spelling of 111221111210221 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, two hundred twenty-one".