20121202020121 has 32 divisors (see below), whose sum is σ = 20947597816320. Its totient is φ = 19312029273600.

The previous prime is 20121202020119. The next prime is 20121202020131. The reversal of 20121202020121 is 12102020212102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20121202020121 - 2¹ = 20121202020119 is a prime.

It is a super-2 number, since 2×20121202020121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20121202020095 and 20121202020104.

It is not an unprimeable number, because it can be changed into a prime (20121202020131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4757908035 + ... + 4757912263.

It is an arithmetic number, because the mean of its divisors is an integer number (654612431760).

Almost surely, 2^{20121202020121} is an apocalyptic number.

It is an amenable number.

20121202020121 is a deficient number, since it is larger than the sum of its proper divisors (826395796199).

20121202020121 is a wasteful number, since it uses less digits than its factorization.

20121202020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20121202020121 its reverse (12102020212102), we get a palindrome (32223222232223).

The spelling of 20121202020121 in words is "twenty trillion, one hundred twenty-one billion, two hundred two million, twenty thousand, one hundred twenty-one".