1011222110221 has 8 divisors (see below), whose sum is σ = 1030450159224. Its totient is φ = 991999557120.

The previous prime is 1011222110183. The next prime is 1011222110291. The reversal of 1011222110221 is 1220112221101.

It can be written as a sum of positive squares in 4 ways, for example, as 250611373321 + 760610736900 = 500611^2 + 872130^2 .

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 1011222110221 - 2²³ = 1011213721613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011222110195 and 1011222110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011222110291) 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, 1001536 + ... + 1739401.

It is an arithmetic number, because the mean of its divisors is an integer number (128806269903).

Almost surely, 2^{1011222110221} is an apocalyptic number.

It is an amenable number.

1011222110221 is a deficient number, since it is larger than the sum of its proper divisors (19228049003).

1011222110221 is an equidigital number, since it uses as much as digits as its factorization.

1011222110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747951.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1011222110221 its reverse (1220112221101), we get a palindrome (2231334331322).

The spelling of 1011222110221 in words is "one trillion, eleven billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty-one".