20200121212001 has 4 divisors (see below), whose sum is σ = 20208541440000. Its totient is φ = 20191700984004.

The previous prime is 20200121211923. The next prime is 20200121212043. The reversal of 20200121212001 is 10021212100202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20200121212001 - 2¹⁰ = 20200121210977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20200121212501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4210110401 + ... + 4210115198.

It is an arithmetic number, because the mean of its divisors is an integer number (5052135360000).

Almost surely, 2^{20200121212001} is an apocalyptic number.

It is an amenable number.

20200121212001 is a deficient number, since it is larger than the sum of its proper divisors (8420227999).

20200121212001 is an equidigital number, since it uses as much as digits as its factorization.

20200121212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8420227998.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20200121212001 its reverse (10021212100202), we get a palindrome (30221333312203).

The spelling of 20200121212001 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twelve thousand, one".