121121012112111 has 24 divisors (see below), whose sum is σ = 192138274270800. Its totient is φ = 72914011756800.

The previous prime is 121121012112071. The next prime is 121121012112167. The reversal of 121121012112111 is 111211210121121.

121121012112111 is a `hidden beast` number, since 1 + 211 + 210 + 1 + 211 + 21 + 11 = 666.

It is not a de Polignac number, because 121121012112111 - 2²¹ = 121121010014959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121012112011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4105503930 + ... + 4105533431.

It is an arithmetic number, because the mean of its divisors is an integer number (8005761427950).

Almost surely, 2^{121121012112111} is an apocalyptic number.

121121012112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121121012112111 is a deficient number, since it is larger than the sum of its proper divisors (71017262158689).

121121012112111 is a wasteful number, since it uses less digits than its factorization.

121121012112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211037527 (or 8211037524 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121121012112111 its reverse (111211210121121), we get a palindrome (232332222233232).

It can be divided in two parts, 1211210121121 and 11, that multiplied together give a palindrome (13323311332331).

The spelling of 121121012112111 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twelve million, one hundred twelve thousand, one hundred eleven".