1200100010220 has 72 divisors (see below), whose sum is σ = 3645827705520. Its totient is φ = 319541013120.

The previous prime is 1200100010173. The next prime is 1200100010231. The reversal of 1200100010220 is 220100010021.

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

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, 4939971 + ... + 5177210.

It is an arithmetic number, because the mean of its divisors is an integer number (50636495910).

Almost surely, 2^{1200100010220} is an apocalyptic number.

1200100010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200100010220 is an abundant number, since it is smaller than the sum of its proper divisors (2445727695300).

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

1200100010220 is a wasteful number, since it uses less digits than its factorization.

1200100010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117855 (or 10117850 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1200100010220 its reverse (220100010021), we get a palindrome (1420200020241).

The spelling of 1200100010220 in words is "one trillion, two hundred billion, one hundred million, ten thousand, two hundred twenty".