1020201022221 has 8 divisors (see below), whose sum is σ = 1360334019840. Its totient is φ = 680101019712.

The previous prime is 1020201022213. The next prime is 1020201022249. The reversal of 1020201022221 is 1222201020201.

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

It is not a de Polignac number, because 1020201022221 - 2³ = 1020201022213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020201022271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8176540 + ... + 8300373.

It is an arithmetic number, because the mean of its divisors is an integer number (170041752480).

Almost surely, 2^{1020201022221} is an apocalyptic number.

It is an amenable number.

1020201022221 is a deficient number, since it is larger than the sum of its proper divisors (340132997619).

1020201022221 is a wasteful number, since it uses less digits than its factorization.

1020201022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16497555.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1020201022221 its reverse (1222201020201), we get a palindrome (2242402042422).

The spelling of 1020201022221 in words is "one trillion, twenty billion, two hundred one million, twenty-two thousand, two hundred twenty-one".