1122202012221 has 24 divisors (see below), whose sum is σ = 1632825425400. Its totient is φ = 742663696896.

The previous prime is 1122202012199. The next prime is 1122202012231. The reversal of 1122202012221 is 1222102022211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148992140025 + 973209872196 = 385995^2 + 986514^2 .

It is not a de Polignac number, because 1122202012221 - 2⁷ = 1122202012093 is a prime.

It is a super-2 number, since 2×1122202012221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1122202012194 and 1122202012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122202012231) 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 23 ways as a sum of consecutive naturals, for example, 1969521 + ... + 2474553.

It is an arithmetic number, because the mean of its divisors is an integer number (68034392725).

Almost surely, 2^{1122202012221} is an apocalyptic number.

It is an amenable number.

1122202012221 is a deficient number, since it is larger than the sum of its proper divisors (510623413179).

1122202012221 is a wasteful number, since it uses less digits than its factorization.

1122202012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506845 (or 506842 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1122202012221 its reverse (1222102022211), we get a palindrome (2344304034432).

The spelling of 1122202012221 in words is "one trillion, one hundred twenty-two billion, two hundred two million, twelve thousand, two hundred twenty-one".