1022222111021 has 4 divisors (see below), whose sum is σ = 1082352823452. Its totient is φ = 962091398592.

The previous prime is 1022222110997. The next prime is 1022222111059. The reversal of 1022222111021 is 1201112222201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 315085755625 + 707136355396 = 561325^2 + 840914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022222111021 - 2³⁸ = 747344204077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 60130712413 = 1022222111021 / (1 + 0 + 2 + 2 + 2 + 2 + 2 + 1 + 1 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222111021) 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 3 ways as a sum of consecutive naturals, for example, 30065356190 + ... + 30065356223.

It is an arithmetic number, because the mean of its divisors is an integer number (270588205863).

Almost surely, 2^{1022222111021} is an apocalyptic number.

It is an amenable number.

1022222111021 is a deficient number, since it is larger than the sum of its proper divisors (60130712431).

1022222111021 is an equidigital number, since it uses as much as digits as its factorization.

1022222111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60130712430.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1022222111021 its reverse (1201112222201), we get a palindrome (2223334333222).

The spelling of 1022222111021 in words is "one trillion, twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, twenty-one".