1222021110121 has 12 divisors (see below), whose sum is σ = 1505154453588. Its totient is φ = 985832155392.

The previous prime is 1222021110109. The next prime is 1222021110131. The reversal of 1222021110121 is 1210111202221.

It can be written as a sum of positive squares in 2 ways, for example, as 652314675600 + 569706434521 = 807660^2 + 754789^2 .

It is not a de Polignac number, because 1222021110121 - 2¹⁹ = 1222020585833 is a prime.

It is a super-2 number, since 2×1222021110121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222021110095 and 1222021110104.

It is not an unprimeable number, because it can be changed into a prime (1222021110131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 733505236 + ... + 733506901.

It is an arithmetic number, because the mean of its divisors is an integer number (125429537799).

Almost surely, 2^{1222021110121} is an apocalyptic number.

It is an amenable number.

1222021110121 is a deficient number, since it is larger than the sum of its proper divisors (283133343467).

1222021110121 is a wasteful number, since it uses less digits than its factorization.

1222021110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467012168 (or 1467012161 counting only the distinct ones).

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

Adding to 1222021110121 its reverse (1210111202221), we get a palindrome (2432132312342).

The spelling of 1222021110121 in words is "one trillion, two hundred twenty-two billion, twenty-one million, one hundred ten thousand, one hundred twenty-one".