20200121220012 has 24 divisors (see below), whose sum is σ = 47372873120496. Its totient is φ = 6699194177088.

The previous prime is 20200121219969. The next prime is 20200121220043. The reversal of 20200121220012 is 21002212100202.

It is a junction number, because it is equal to n+sod(n) for n = 20200121219973 and 20200121220000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4272442903 + ... + 4272447630.

It is an arithmetic number, because the mean of its divisors is an integer number (1973869713354).

Almost surely, 2^{20200121220012} is an apocalyptic number.

It is an amenable number.

20200121220012 is an abundant number, since it is smaller than the sum of its proper divisors (27172751900484).

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

20200121220012 is a wasteful number, since it uses less digits than its factorization.

20200121220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544890737 (or 8544890735 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20200121220012 its reverse (21002212100202), we get a palindrome (41202333320214).

The spelling of 20200121220012 in words is "twenty trillion, two hundred billion, one hundred twenty-one million, two hundred twenty thousand, twelve".