201020000122021 has 4 divisors (see below), whose sum is σ = 201029358180844. Its totient is φ = 201010642063200.

The previous prime is 201020000121937. The next prime is 201020000122043. The reversal of 201020000122021 is 120221000020102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131545874729025 + 69474125392996 = 11469345^2 + 8335114^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020000122021 - 2²⁹ = 201019463251109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020000121992 and 201020000122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020000122121) 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, 4678997190 + ... + 4679040151.

It is an arithmetic number, because the mean of its divisors is an integer number (50257339545211).

Almost surely, 2^{201020000122021} is an apocalyptic number.

It is an amenable number.

201020000122021 is a deficient number, since it is larger than the sum of its proper divisors (9358058823).

201020000122021 is an equidigital number, since it uses as much as digits as its factorization.

201020000122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358058822.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201020000122021 its reverse (120221000020102), we get a palindrome (321241000142123).

The spelling of 201020000122021 in words is "two hundred one trillion, twenty billion, one hundred twenty-two thousand, twenty-one".