1620221219200 has 96 divisors (see below), whose sum is σ = 4047424821000. Its totient is φ = 640806481920.

The previous prime is 1620221219147. The next prime is 1620221219207. The reversal of 1620221219200 is 29121220261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620221219207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2559690 + ... + 3129289.

Almost surely, 2^{1620221219200} is an apocalyptic number.

1620221219200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620221219200 is an abundant number, since it is smaller than the sum of its proper divisors (2427203601800).

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

1620221219200 is an equidigital number, since it uses as much as digits as its factorization.

1620221219200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689092 (or 5689075 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 1620221219200 its reverse (29121220261), we get a palindrome (1649342439461).

The spelling of 1620221219200 in words is "one trillion, six hundred twenty billion, two hundred twenty-one million, two hundred nineteen thousand, two hundred".