121004012111 has 4 divisors (see below), whose sum is σ = 122661601392. Its totient is φ = 119346422832.

The previous prime is 121004012057. The next prime is 121004012113. The reversal of 121004012111 is 111210400121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111210400121 = 311 ⋅357589711.

It is a cyclic number.

It is not a de Polignac number, because 121004012111 - 2³⁰ = 119930270287 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 (121004012113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828794531 + ... + 828794676.

It is an arithmetic number, because the mean of its divisors is an integer number (30665400348).

Almost surely, 2^121004012111 is an apocalyptic number.

121004012111 is a deficient number, since it is larger than the sum of its proper divisors (1657589281).

121004012111 is an equidigital number, since it uses as much as digits as its factorization.

121004012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657589280.

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

Adding to 121004012111 its reverse (111210400121), we get a palindrome (232214412232).

The spelling of 121004012111 in words is "one hundred twenty-one billion, four million, twelve thousand, one hundred eleven".