111120210212121 has 12 divisors (see below), whose sum is σ = 175098513061680. Its totient is φ = 67345581946680.

The previous prime is 111120210212029. The next prime is 111120210212147. The reversal of 111120210212121 is 121212012021111.

It is a happy number.

111120210212121 is a `hidden beast` number, since 1 + 1 + 1 + 120 + 210 + 212 + 121 = 666.

It is not a de Polignac number, because 111120210212121 - 2⁴² = 106722163701017 is a prime.

It is a super-2 number, since 2×111120210212121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111120210212094 and 111120210212103.

It is not an unprimeable number, because it can be changed into a prime (111120210212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561213182791 + ... + 561213182988.

It is an arithmetic number, because the mean of its divisors is an integer number (14591542755140).

Almost surely, 2^{111120210212121} is an apocalyptic number.

111120210212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111120210212121 is a deficient number, since it is larger than the sum of its proper divisors (63978302849559).

111120210212121 is a wasteful number, since it uses less digits than its factorization.

111120210212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122426365796 (or 1122426365793 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111120210212121 its reverse (121212012021111), we get a palindrome (232332222233232).

The spelling of 111120210212121 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-one".