111221201001121 has 16 divisors (see below), whose sum is σ = 111610521285120. Its totient is φ = 110832483643200.

The previous prime is 111221201001091. The next prime is 111221201001149. The reversal of 111221201001121 is 121100102122111.

It is a cyclic number.

It is not a de Polignac number, because 111221201001121 - 2¹⁷ = 111221200870049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221201001095 and 111221201001104.

It is not an unprimeable number, because it can be changed into a prime (111221201001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1725959820 + ... + 1726024258.

It is an arithmetic number, because the mean of its divisors is an integer number (6975657580320).

Almost surely, 2^{111221201001121} is an apocalyptic number.

It is an amenable number.

111221201001121 is a deficient number, since it is larger than the sum of its proper divisors (389320283999).

111221201001121 is a wasteful number, since it uses less digits than its factorization.

111221201001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69024.

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

Adding to 111221201001121 its reverse (121100102122111), we get a palindrome (232321303123232).

The spelling of 111221201001121 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred one million, one thousand, one hundred twenty-one".