1221122201202 has 24 divisors (see below), whose sum is σ = 2710295618940. Its totient is φ = 397112910720.

The previous prime is 1221122201197. The next prime is 1221122201209. The reversal of 1221122201202 is 2021022211221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1220717829321 + 404371881 = 1104861^2 + 20109^2 .

It is a super-2 number, since 2×1221122201202² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1221122201209) 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, 827317827 + ... + 827319302.

Almost surely, 2^{1221122201202} is an apocalyptic number.

1221122201202 is an abundant number, since it is smaller than the sum of its proper divisors (1489173417738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221122201202 is a wasteful number, since it uses less digits than its factorization.

1221122201202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654637178 (or 1654637175 counting only the distinct ones).

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

Adding to 1221122201202 its reverse (2021022211221), we get a palindrome (3242144412423).

The spelling of 1221122201202 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred one thousand, two hundred two".