20200121121012 has 24 divisors (see below), whose sum is σ = 53866989656256. Its totient is φ = 5771463177408.

The previous prime is 20200121120999. The next prime is 20200121121107. The reversal of 20200121121012 is 21012112100202.

It is a junction number, because it is equal to n+sod(n) for n = 20200121120982 and 20200121121000.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120238816113 + ... + 120238816280.

It is an arithmetic number, because the mean of its divisors is an integer number (2244457902344).

Almost surely, 2^{20200121121012} is an apocalyptic number.

It is an amenable number.

20200121121012 is an abundant number, since it is smaller than the sum of its proper divisors (33666868535244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20200121121012 is a wasteful number, since it uses less digits than its factorization.

20200121121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240477632407 (or 240477632405 counting only the distinct ones).

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

Adding to 20200121121012 its reverse (21012112100202), we get a palindrome (41212233221214).

The spelling of 20200121121012 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, twelve".