121101010212121 has 8 divisors (see below), whose sum is σ = 125007721977600. Its totient is φ = 117194312669520.

The previous prime is 121101010212113. The next prime is 121101010212163. The reversal of 121101010212121 is 121212010101121.

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

It is a cyclic number.

It is not a de Polignac number, because 121101010212121 - 2³ = 121101010212113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121101010212095 and 121101010212104.

It is not an unprimeable number, because it can be changed into a prime (121101010212521) 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 7 ways as a sum of consecutive naturals, for example, 15342375 + ... + 21853843.

It is an arithmetic number, because the mean of its divisors is an integer number (15625965247200).

Almost surely, 2^{121101010212121} is an apocalyptic number.

It is an amenable number.

121101010212121 is a deficient number, since it is larger than the sum of its proper divisors (3906711765479).

121101010212121 is an equidigital number, since it uses as much as digits as its factorization.

121101010212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111439.

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

Adding to 121101010212121 its reverse (121212010101121), we get a palindrome (242313020313242).

The spelling of 121101010212121 in words is "one hundred twenty-one trillion, one hundred one billion, ten million, two hundred twelve thousand, one hundred twenty-one".