1220111022300 has 72 divisors (see below), whose sum is σ = 3537123870000. Its totient is φ = 324723678720.

The previous prime is 1220111022293. The next prime is 1220111022301. The reversal of 1220111022300 is 32201110221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220111022300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220111022301) 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 23 ways as a sum of consecutive naturals, for example, 3842425 + ... + 4147824.

Almost surely, 2^{1220111022300} is an apocalyptic number.

1220111022300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111022300 is an abundant number, since it is smaller than the sum of its proper divisors (2317012847700).

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

1220111022300 is a wasteful number, since it uses less digits than its factorization.

1220111022300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7990775 (or 7990768 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1220111022300 its reverse (32201110221), we get a palindrome (1252312132521).

The spelling of 1220111022300 in words is "one trillion, two hundred twenty billion, one hundred eleven million, twenty-two thousand, three hundred".