201220220212021 has 8 divisors (see below), whose sum is σ = 202025482738200. Its totient is φ = 200415381626880.

The previous prime is 201220220212001. The next prime is 201220220212051. The reversal of 201220220212021 is 120212022022102.

It can be written as a sum of positive squares in 4 ways, for example, as 2414027193796 + 198806193018225 = 1553714^2 + 14099865^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201220220212021 - 2³³ = 201211630277429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201220220212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220220212001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105034060 + ... + 106932661.

It is an arithmetic number, because the mean of its divisors is an integer number (25253185342275).

Almost surely, 2^{201220220212021} is an apocalyptic number.

It is an amenable number.

201220220212021 is a deficient number, since it is larger than the sum of its proper divisors (805262526179).

201220220212021 is a wasteful number, since it uses less digits than its factorization.

201220220212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211970519.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201220220212021 its reverse (120212022022102), we get a palindrome (321432242234123).

The spelling of 201220220212021 in words is "two hundred one trillion, two hundred twenty billion, two hundred twenty million, two hundred twelve thousand, twenty-one".