1010221200221 has 4 divisors (see below), whose sum is σ = 1010544888444. Its totient is φ = 1009897512000.

The previous prime is 1010221200203. The next prime is 1010221200269. The reversal of 1010221200221 is 1220021220101.

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 7829772196 + 1002391428025 = 88486^2 + 1001195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010221200221 - 2¹⁴ = 1010221183837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1010221200196 and 1010221200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010221200421) 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, 161839430 + ... + 161845671.

It is an arithmetic number, because the mean of its divisors is an integer number (252636222111).

Almost surely, 2^{1010221200221} is an apocalyptic number.

It is an amenable number.

1010221200221 is a deficient number, since it is larger than the sum of its proper divisors (323688223).

1010221200221 is an equidigital number, since it uses as much as digits as its factorization.

1010221200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323688222.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1010221200221 its reverse (1220021220101), we get a palindrome (2230242420322).

The spelling of 1010221200221 in words is "one trillion, ten billion, two hundred twenty-one million, two hundred thousand, two hundred twenty-one".