1200000002220 has 72 divisors (see below), whose sum is σ = 3798260889696. Its totient is φ = 306086956032.

The previous prime is 1200000002189. The next prime is 1200000002249. The reversal of 1200000002220 is 222000000021.

It is a Harshad number since it is a multiple of its sum of digits (9).

1200000002220 is a modest number, since divided by 2220 gives 1200 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144923397 + ... + 144931676.

It is an arithmetic number, because the mean of its divisors is an integer number (52753623468).

Almost surely, 2^{1200000002220} is an apocalyptic number.

1200000002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200000002220 is an abundant number, since it is smaller than the sum of its proper divisors (2598260887476).

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

1200000002220 is a wasteful number, since it uses less digits than its factorization.

1200000002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289855111 (or 289855106 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 1200000002220 its reverse (222000000021), we get a palindrome (1422000002241).

The spelling of 1200000002220 in words is "one trillion, two hundred billion, two thousand, two hundred twenty".