1220002202052 has 18 divisors (see below), whose sum is σ = 3083894455278. Its totient is φ = 406667400672.

The previous prime is 1220002202051. The next prime is 1220002202119. The reversal of 1220002202052 is 2502022000221.

It can be written as a sum of positive squares in only one way, i.e., 877489321536 + 342512880516 = 936744^2 + 585246^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 (1220002202051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16944474993 + ... + 16944475064.

Almost surely, 2^{1220002202052} is an apocalyptic number.

1220002202052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220002202052 is an abundant number, since it is smaller than the sum of its proper divisors (1863892253226).

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

1220002202052 is a wasteful number, since it uses less digits than its factorization.

1220002202052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33888950067 (or 33888950062 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 1220002202052 its reverse (2502022000221), we get a palindrome (3722024202273).

The spelling of 1220002202052 in words is "one trillion, two hundred twenty billion, two million, two hundred two thousand, fifty-two".