1001020202221 has 8 divisors (see below), whose sum is σ = 1078047837720. Its totient is φ = 923996292672.

The previous prime is 1001020202191. The next prime is 1001020202249. The reversal of 1001020202221 is 1222020201001.

It is a happy number.

1001020202221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11850717321 + 989169484900 = 108861^2 + 994570^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1001020202221 - 2⁷ = 1001020202093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001020202621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360526 + ... + 1460143.

It is an arithmetic number, because the mean of its divisors is an integer number (134755979715).

Almost surely, 2^{1001020202221} is an apocalyptic number.

It is an amenable number.

1001020202221 is a deficient number, since it is larger than the sum of its proper divisors (77027635499).

1001020202221 is a wasteful number, since it uses less digits than its factorization.

1001020202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862975.

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

Adding to 1001020202221 its reverse (1222020201001), we get a palindrome (2223040403222).

The spelling of 1001020202221 in words is "one trillion, one billion, twenty million, two hundred two thousand, two hundred twenty-one".