12121120210121 has 16 divisors (see below), whose sum is σ = 13621195185024. Its totient is φ = 10702152324864.

The previous prime is 12121120210103. The next prime is 12121120210127. The reversal of 12121120210121 is 12101202112121.

It is not a de Polignac number, because 12121120210121 - 2⁶ = 12121120210057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121120210121.

It is not an unprimeable number, because it can be changed into a prime (12121120210127) 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 15 ways as a sum of consecutive naturals, for example, 51219350 + ... + 51455456.

It is an arithmetic number, because the mean of its divisors is an integer number (851324699064).

Almost surely, 2^{12121120210121} is an apocalyptic number.

It is an amenable number.

12121120210121 is a deficient number, since it is larger than the sum of its proper divisors (1500074974903).

12121120210121 is a wasteful number, since it uses less digits than its factorization.

12121120210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407840.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121120210121 its reverse (12101202112121), we get a palindrome (24222322322242).

The spelling of 12121120210121 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".