111001210220121 has 16 divisors (see below), whose sum is σ = 159444333048000. Its totient is φ = 68283588525120.

The previous prime is 111001210220039. The next prime is 111001210220129. The reversal of 111001210220121 is 121022012100111.

It is a happy number.

It is not a de Polignac number, because 111001210220121 - 2¹⁵ = 111001210187353 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111001210220121.

It is not an unprimeable number, because it can be changed into a prime (111001210220129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517569195 + ... + 517783616.

It is an arithmetic number, because the mean of its divisors is an integer number (9965270815500).

Almost surely, 2^{111001210220121} is an apocalyptic number.

It is an amenable number.

111001210220121 is a deficient number, since it is larger than the sum of its proper divisors (48443122827879).

111001210220121 is a wasteful number, since it uses less digits than its factorization.

111001210220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035355576.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111001210220121 its reverse (121022012100111), we get a palindrome (232023222320232).

The spelling of 111001210220121 in words is "one hundred eleven trillion, one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".