1020200222221 has 4 divisors (see below), whose sum is σ = 1020222566944. Its totient is φ = 1020177877500.

The previous prime is 1020200222219. The next prime is 1020200222231. The reversal of 1020200222221 is 1222220020201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020200222221 - 2¹ = 1020200222219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020200222195 and 1020200222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200222231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11103735 + ... + 11195236.

It is an arithmetic number, because the mean of its divisors is an integer number (255055641736).

Almost surely, 2^{1020200222221} is an apocalyptic number.

It is an amenable number.

1020200222221 is a deficient number, since it is larger than the sum of its proper divisors (22344723).

1020200222221 is an equidigital number, since it uses as much as digits as its factorization.

1020200222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22344722.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1020200222221 its reverse (1222220020201), we get a palindrome (2242420242422).

It can be divided in two parts, 1020200 and 222221, that added together give a palindrome (1242421).

The spelling of 1020200222221 in words is "one trillion, twenty billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".