202012200021 has 8 divisors (see below), whose sum is σ = 273369743584. Its totient is φ = 132664728240.

The previous prime is 202012200017. The next prime is 202012200029. The reversal of 202012200021 is 120002210202.

202012200021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202012200021 - 2² = 202012200017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012200029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502517710 + ... + 502518111.

It is an arithmetic number, because the mean of its divisors is an integer number (34171217948).

Almost surely, 2^202012200021 is an apocalyptic number.

It is an amenable number.

202012200021 is a deficient number, since it is larger than the sum of its proper divisors (71357543563).

202012200021 is a wasteful number, since it uses less digits than its factorization.

202012200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005035891.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202012200021 its reverse (120002210202), we get a palindrome (322014410223).

It can be divided in two parts, 20201 and 2200021, that added together give a palindrome (2220222).

The spelling of 202012200021 in words is "two hundred two billion, twelve million, two hundred thousand, twenty-one".