121221002111 has 8 divisors (see below), whose sum is σ = 140019981264. Its totient is φ = 103718504320.

The previous prime is 121221002093. The next prime is 121221002113. The reversal of 121221002111 is 111200122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221002111 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 (121221002113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324120140 + ... + 324120513.

It is an arithmetic number, because the mean of its divisors is an integer number (17502497658).

Almost surely, 2^121221002111 is an apocalyptic number.

121221002111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121221002111 is a deficient number, since it is larger than the sum of its proper divisors (18798979153).

121221002111 is a wasteful number, since it uses less digits than its factorization.

121221002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648240681.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221002111 its reverse (111200122121), we get a palindrome (232421124232).

The spelling of 121221002111 in words is "one hundred twenty-one billion, two hundred twenty-one million, two thousand, one hundred eleven".