121231310010121 has 16 divisors (see below), whose sum is σ = 127749902866560. Its totient is φ = 114888710926080.

The previous prime is 121231310010079. The next prime is 121231310010193. The reversal of 121231310010121 is 121010013132121.

It is a cyclic number.

It is not a de Polignac number, because 121231310010121 - 2³⁷ = 121093871056649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231310014121) 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 15 ways as a sum of consecutive naturals, for example, 179247915 + ... + 179922976.

It is an arithmetic number, because the mean of its divisors is an integer number (7984368929160).

Almost surely, 2^{121231310010121} is an apocalyptic number.

It is an amenable number.

121231310010121 is a deficient number, since it is larger than the sum of its proper divisors (6518592856439).

121231310010121 is a wasteful number, since it uses less digits than its factorization.

121231310010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359171136.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121231310010121 its reverse (121010013132121), we get a palindrome (242241323142242).

The spelling of 121231310010121 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred ten million, ten thousand, one hundred twenty-one".