20200120200121 has 24 divisors (see below), whose sum is σ = 22594211460000. Its totient is φ = 18006013638144.

The previous prime is 20200120200107. The next prime is 20200120200133. The reversal of 20200120200121 is 12100202100202.

It is a happy number.

It is not a de Polignac number, because 20200120200121 - 2¹³ = 20200120191929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200120203121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18405150 + ... + 19471768.

It is an arithmetic number, because the mean of its divisors is an integer number (941425477500).

Almost surely, 2^{20200120200121} is an apocalyptic number.

It is an amenable number.

20200120200121 is a deficient number, since it is larger than the sum of its proper divisors (2394091259879).

20200120200121 is a wasteful number, since it uses less digits than its factorization.

20200120200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070121 (or 1070104 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20200120200121 its reverse (12100202100202), we get a palindrome (32300322300323).

The spelling of 20200120200121 in words is "twenty trillion, two hundred billion, one hundred twenty million, two hundred thousand, one hundred twenty-one".