20202301001221 has 4 divisors (see below), whose sum is σ = 20203520006572. Its totient is φ = 20201081995872.

The previous prime is 20202301001219. The next prime is 20202301001413. The reversal of 20202301001221 is 12210010320202.

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 18093665932225 + 2108635068996 = 4253665^2 + 1452114^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202301001221 - 2¹ = 20202301001219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202301001195 and 20202301001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202301001521) 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, 609477816 + ... + 609510961.

It is an arithmetic number, because the mean of its divisors is an integer number (5050880001643).

Almost surely, 2^{20202301001221} is an apocalyptic number.

It is an amenable number.

20202301001221 is a deficient number, since it is larger than the sum of its proper divisors (1219005351).

20202301001221 is a wasteful number, since it uses less digits than its factorization.

20202301001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219005350.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20202301001221 its reverse (12210010320202), we get a palindrome (32412311321423).

The spelling of 20202301001221 in words is "twenty trillion, two hundred two billion, three hundred one million, one thousand, two hundred twenty-one".