121101110002121 has 4 divisors (see below), whose sum is σ = 122908589255952. Its totient is φ = 119293630748292.

The previous prime is 121101110002111. The next prime is 121101110002133. The reversal of 121101110002121 is 121200011101121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121101110002121 - 2⁶ = 121101110002057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101110002096 and 121101110002105.

It is not an unprimeable number, because it can be changed into a prime (121101110002111) 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, 903739626815 + ... + 903739626948.

It is an arithmetic number, because the mean of its divisors is an integer number (30727147313988).

Almost surely, 2^{121101110002121} is an apocalyptic number.

It is an amenable number.

121101110002121 is a deficient number, since it is larger than the sum of its proper divisors (1807479253831).

121101110002121 is an equidigital number, since it uses as much as digits as its factorization.

121101110002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807479253830.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121101110002121 its reverse (121200011101121), we get a palindrome (242301121103242).

The spelling of 121101110002121 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred ten million, two thousand, one hundred twenty-one".