20121120020121 has 32 divisors (see below), whose sum is σ = 27851726622720. Its totient is φ = 12912025449600.

The previous prime is 20121120020119. The next prime is 20121120020137. The reversal of 20121120020121 is 12102002112102.

It is not a de Polignac number, because 20121120020121 - 2¹ = 20121120020119 is a prime.

It is a super-2 number, since 2×20121120020121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20121120020121.

It is not an unprimeable number, because it can be changed into a prime (20121120020101) 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, 503010 + ... + 6363588.

It is an arithmetic number, because the mean of its divisors is an integer number (870366456960).

Almost surely, 2^{20121120020121} is an apocalyptic number.

It is an amenable number.

20121120020121 is a deficient number, since it is larger than the sum of its proper divisors (7730606602599).

20121120020121 is a wasteful number, since it uses less digits than its factorization.

20121120020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5860997.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121120020121 its reverse (12102002112102), we get a palindrome (32223122132223).

The spelling of 20121120020121 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, twenty thousand, one hundred twenty-one".