1222011022121 has 12 divisors (see below), whose sum is σ = 1293499995732. Its totient is φ = 1153747584000.

The previous prime is 1222011022031. The next prime is 1222011022123. The reversal of 1222011022121 is 1212201102221.

It can be written as a sum of positive squares in 2 ways, for example, as 680220810025 + 541790212096 = 824755^2 + 736064^2 .

It is not a de Polignac number, because 1222011022121 - 2²² = 1222006827817 is a prime.

It is a super-2 number, since 2×1222011022121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222011022121.

It is not an unprimeable number, because it can be changed into a prime (1222011022123) 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, 15467960 + ... + 15546761.

It is an arithmetic number, because the mean of its divisors is an integer number (107791666311).

Almost surely, 2^{1222011022121} is an apocalyptic number.

It is an amenable number.

1222011022121 is a deficient number, since it is larger than the sum of its proper divisors (71488973611).

1222011022121 is an equidigital number, since it uses as much as digits as its factorization.

1222011022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31014824 (or 31014793 counting only the distinct ones).

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

Adding to 1222011022121 its reverse (1212201102221), we get a palindrome (2434212124342).

The spelling of 1222011022121 in words is "one trillion, two hundred twenty-two billion, eleven million, twenty-two thousand, one hundred twenty-one".