121012211111103 has 48 divisors (see below), whose sum is σ = 192676545524736. Its totient is φ = 72734022527040.

The previous prime is 121012211111089. The next prime is 121012211111117. The reversal of 121012211111103 is 301111112210121.

It is an interprime number because it is at equal distance from previous prime (121012211111089) and next prime (121012211111117).

It is not a de Polignac number, because 121012211111103 - 2⁶ = 121012211111039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012211111203) 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 47 ways as a sum of consecutive naturals, for example, 67183575 + ... + 68961272.

It is an arithmetic number, because the mean of its divisors is an integer number (4014094698432).

Almost surely, 2^{121012211111103} is an apocalyptic number.

121012211111103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121012211111103 is a deficient number, since it is larger than the sum of its proper divisors (71664334413633).

121012211111103 is a wasteful number, since it uses less digits than its factorization.

121012211111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136145044 (or 136145041 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 121012211111103 its reverse (301111112210121), we get a palindrome (422123323321224).

The spelling of 121012211111103 in words is "one hundred twenty-one trillion, twelve billion, two hundred eleven million, one hundred eleven thousand, one hundred three".