121002002111 has 4 divisors (see below), whose sum is σ = 121024469352. Its totient is φ = 120979534872.

The previous prime is 121002002089. The next prime is 121002002167. The reversal of 121002002111 is 111200200121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111200200121 = 227 ⋅489868723.

It is a cyclic number.

It is not a de Polignac number, because 121002002111 - 2⁶ = 121002002047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002002092 and 121002002101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002002311) 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 3 ways as a sum of consecutive naturals, for example, 11225540 + ... + 11236313.

It is an arithmetic number, because the mean of its divisors is an integer number (30256117338).

Almost surely, 2^121002002111 is an apocalyptic number.

121002002111 is a deficient number, since it is larger than the sum of its proper divisors (22467241).

121002002111 is an equidigital number, since it uses as much as digits as its factorization.

121002002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22467240.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121002002111 its reverse (111200200121), we get a palindrome (232202202232).

The spelling of 121002002111 in words is "one hundred twenty-one billion, two million, two thousand, one hundred eleven".