12100020121 has 16 divisors (see below), whose sum is σ = 13887224064. Its totient is φ = 10327535424.

The previous prime is 12100020109. The next prime is 12100020143. The reversal of 12100020121 is 12102000121.

It is a cyclic number.

It is not a de Polignac number, because 12100020121 - 2¹³ = 12100011929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100020098 and 12100020107.

It is not an unprimeable number, because it can be changed into a prime (12100023121) 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, 4832956 + ... + 4835458.

It is an arithmetic number, because the mean of its divisors is an integer number (867951504).

Almost surely, 2^12100020121 is an apocalyptic number.

It is an amenable number.

12100020121 is a deficient number, since it is larger than the sum of its proper divisors (1787203943).

12100020121 is a wasteful number, since it uses less digits than its factorization.

12100020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12100020121 its reverse (12102000121), we get a palindrome (24202020242).

The spelling of 12100020121 in words is "twelve billion, one hundred million, twenty thousand, one hundred twenty-one".