1200100222220 has 48 divisors (see below), whose sum is σ = 2538238943520. Its totient is φ = 476610860544.

The previous prime is 1200100222171. The next prime is 1200100222271. The reversal of 1200100222220 is 222220010021.

It is a junction number, because it is equal to n+sod(n) for n = 1200100222195 and 1200100222204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3899207 + ... + 4195713.

It is an arithmetic number, because the mean of its divisors is an integer number (52879977990).

Almost surely, 2^{1200100222220} is an apocalyptic number.

1200100222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200100222220 is an abundant number, since it is smaller than the sum of its proper divisors (1338138721300).

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

1200100222220 is a wasteful number, since it uses less digits than its factorization.

1200100222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297962 (or 297960 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1200100222220 its reverse (222220010021), we get a palindrome (1422320232241).

The spelling of 1200100222220 in words is "one trillion, two hundred billion, one hundred million, two hundred twenty-two thousand, two hundred twenty".