1220002202118 has 32 divisors (see below), whose sum is σ = 2788635628800. Its totient is φ = 348564661920.

The previous prime is 1220002202051. The next prime is 1220002202119. The reversal of 1220002202118 is 8112022000221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1220002202094 and 1220002202103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220002202119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1877233 + ... + 2442131.

It is an arithmetic number, because the mean of its divisors is an integer number (87144863400).

Almost surely, 2^{1220002202118} is an apocalyptic number.

1220002202118 is an abundant number, since it is smaller than the sum of its proper divisors (1568633426682).

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

1220002202118 is a wasteful number, since it uses less digits than its factorization.

1220002202118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616332.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 1220002202118 its reverse (8112022000221), we get a palindrome (9332024202339).

The spelling of 1220002202118 in words is "one trillion, two hundred twenty billion, two million, two hundred two thousand, one hundred eighteen".