121012121221011 has 16 divisors (see below), whose sum is σ = 185060352645120. Its totient is φ = 78072336271080.

The previous prime is 121012121220997. The next prime is 121012121221037. The reversal of 121012121221011 is 110122121210121.

It is a happy number.

121012121221011 is a `hidden beast` number, since 1 + 210 + 1 + 21 + 212 + 210 + 11 = 666.

It is not a de Polignac number, because 121012121221011 - 2⁴¹ = 118813097965459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121012121221811) 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 15 ways as a sum of consecutive naturals, for example, 72289199415 + ... + 72289201088.

It is an arithmetic number, because the mean of its divisors is an integer number (11566272040320).

Almost surely, 2^{121012121221011} is an apocalyptic number.

121012121221011 is a deficient number, since it is larger than the sum of its proper divisors (64048231424109).

121012121221011 is a wasteful number, since it uses less digits than its factorization.

121012121221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144578400543 (or 144578400537 counting only the distinct ones).

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

Adding to 121012121221011 its reverse (110122121210121), we get a palindrome (231134242431132).

The spelling of 121012121221011 in words is "one hundred twenty-one trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, eleven".