121003213111 has 16 divisors (see below), whose sum is σ = 132557679648. Its totient is φ = 109541376000.

The previous prime is 121003213109. The next prime is 121003213147. The reversal of 121003213111 is 111312300121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121003213111 - 2¹ = 121003213109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003213151) 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 15 ways as a sum of consecutive naturals, for example, 17809531 + ... + 17816323.

It is an arithmetic number, because the mean of its divisors is an integer number (8284854978).

Almost surely, 2^121003213111 is an apocalyptic number.

121003213111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121003213111 is a deficient number, since it is larger than the sum of its proper divisors (11554466537).

121003213111 is a wasteful number, since it uses less digits than its factorization.

121003213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121003213111 its reverse (111312300121), we get a palindrome (232315513232).

The spelling of 121003213111 in words is "one hundred twenty-one billion, three million, two hundred thirteen thousand, one hundred eleven".