1022202001021 has 8 divisors (see below), whose sum is σ = 1026476168184. Its totient is φ = 1017932348160.

The previous prime is 1022202000977. The next prime is 1022202001057. The reversal of 1022202001021 is 1201002022201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 210786583225 + 811415417796 = 459115^2 + 900786^2 .

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 1022202001021 - 2⁷ = 1022202000893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022202000992 and 1022202001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022202001421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674376 + ... + 1580881.

It is an arithmetic number, because the mean of its divisors is an integer number (128309521023).

Almost surely, 2^{1022202001021} is an apocalyptic number.

It is an amenable number.

1022202001021 is a deficient number, since it is larger than the sum of its proper divisors (4274167163).

1022202001021 is a wasteful number, since it uses less digits than its factorization.

1022202001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257151.

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

Adding to 1022202001021 its reverse (1201002022201), we get a palindrome (2223204023222).

The spelling of 1022202001021 in words is "one trillion, twenty-two billion, two hundred two million, one thousand, twenty-one".