1121022122221 has 8 divisors (see below), whose sum is σ = 1187962889400. Its totient is φ = 1055967010560.

The previous prime is 1121022122203. The next prime is 1121022122257. The reversal of 1121022122221 is 1222212201211.

It can be written as a sum of positive squares in 4 ways, for example, as 199796484196 + 921225638025 = 446986^2 + 959805^2 .

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 1121022122221 - 2⁵ = 1121022122189 is a prime.

It is a super-3 number, since 3×1121022122221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121022122201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471412656 + ... + 471415033.

It is an arithmetic number, because the mean of its divisors is an integer number (148495361175).

Almost surely, 2^{1121022122221} is an apocalyptic number.

It is an amenable number.

1121022122221 is a deficient number, since it is larger than the sum of its proper divisors (66940767179).

1121022122221 is an equidigital number, since it uses as much as digits as its factorization.

1121022122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942827759.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1121022122221 its reverse (1222212201211), we get a palindrome (2343234323432).

The spelling of 1121022122221 in words is "one trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".