20200120220021 has 12 divisors (see below), whose sum is σ = 24256102227840. Its totient is φ = 16755860089080.

The previous prime is 20200120219963. The next prime is 20200120220023. The reversal of 20200120220021 is 12002202100202.

It is not a de Polignac number, because 20200120220021 - 2³⁰ = 20199046478197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20200120219978 and 20200120220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200120220023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6649149311 + ... + 6649152348.

It is an arithmetic number, because the mean of its divisors is an integer number (2021341852320).

Almost surely, 2^{20200120220021} is an apocalyptic number.

It is an amenable number.

20200120220021 is a deficient number, since it is larger than the sum of its proper divisors (4055982007819).

20200120220021 is a wasteful number, since it uses less digits than its factorization.

20200120220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13298301704 (or 13298301697 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20200120220021 its reverse (12002202100202), we get a palindrome (32202322320223).

The spelling of 20200120220021 in words is "twenty trillion, two hundred billion, one hundred twenty million, two hundred twenty thousand, twenty-one".