1013211020221 has 2 divisors, whose sum is σ = 1013211020222. Its totient is φ = 1013211020220.

The previous prime is 1013211020203. The next prime is 1013211020243. The reversal of 1013211020221 is 1220201123101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843146332900 + 170064687321 = 918230^2 + 412389^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013211020221 - 2¹¹ = 1013211018173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1013211020195 and 1013211020204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013211020251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506605510110 + 506605510111.

It is an arithmetic number, because the mean of its divisors is an integer number (506605510111).

Almost surely, 2^{1013211020221} is an apocalyptic number.

It is an amenable number.

1013211020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013211020221 is an equidigital number, since it uses as much as digits as its factorization.

1013211020221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1013211020221 its reverse (1220201123101), we get a palindrome (2233412143322).

The spelling of 1013211020221 in words is "one trillion, thirteen billion, two hundred eleven million, twenty thousand, two hundred twenty-one".