12122121210121 has 32 divisors (see below), whose sum is σ = 13283836538112. Its totient is φ = 10994300190720.

The previous prime is 12122121209999. The next prime is 12122121210137. The reversal of 12122121210121 is 12101212122121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12122121210121 - 2¹³ = 12122121201929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122121270121) 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 31 ways as a sum of consecutive naturals, for example, 324857961 + ... + 324895273.

It is an arithmetic number, because the mean of its divisors is an integer number (415119891816).

Almost surely, 2^{12122121210121} is an apocalyptic number.

It is an amenable number.

12122121210121 is a deficient number, since it is larger than the sum of its proper divisors (1161715327991).

12122121210121 is a wasteful number, since it uses less digits than its factorization.

12122121210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38593.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122121210121 its reverse (12101212122121), we get a palindrome (24223333332242).

The spelling of 12122121210121 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-one".