121051402121 has 16 divisors (see below), whose sum is σ = 138064726800. Its totient is φ = 105141485568.

The previous prime is 121051402117. The next prime is 121051402181. The reversal of 121051402121 is 121204150121.

It can be written as a sum of positive squares in 8 ways, for example, as 3333792121 + 117717610000 = 57739^2 + 343100^2 .

It is a cyclic number.

It is not a de Polignac number, because 121051402121 - 2² = 121051402117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121051402093 and 121051402102.

It is not an unprimeable number, because it can be changed into a prime (121051402181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884015 + ... + 1011723.

It is an arithmetic number, because the mean of its divisors is an integer number (8629045425).

Almost surely, 2^121051402121 is an apocalyptic number.

It is an amenable number.

121051402121 is a deficient number, since it is larger than the sum of its proper divisors (17013324679).

121051402121 is a wasteful number, since it uses less digits than its factorization.

121051402121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132028.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 121051402121 its reverse (121204150121), we get a palindrome (242255552242).

The spelling of 121051402121 in words is "one hundred twenty-one billion, fifty-one million, four hundred two thousand, one hundred twenty-one".