121610102121 has 24 divisors (see below), whose sum is σ = 177509523464. Its totient is φ = 80219704320.

The previous prime is 121610102101. The next prime is 121610102143. The reversal of 121610102121 is 121201016121.

121610102121 is a `hidden beast` number, since 1 + 2 + 1 + 610 + 10 + 21 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6053618025 + 115556484096 = 77805^2 + 339936^2 .

It is not a de Polignac number, because 121610102121 - 2⁷ = 121610101993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121610102094 and 121610102103.

It is not an unprimeable number, because it can be changed into a prime (121610102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4733691 + ... + 4759311.

Almost surely, 2^121610102121 is an apocalyptic number.

It is an amenable number.

121610102121 is a deficient number, since it is larger than the sum of its proper divisors (55899421343).

121610102121 is a wasteful number, since it uses less digits than its factorization.

121610102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31161 (or 31158 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121610102121 its reverse (121201016121), we get a palindrome (242811118242).

The spelling of 121610102121 in words is "one hundred twenty-one billion, six hundred ten million, one hundred two thousand, one hundred twenty-one".