1200111100220 has 48 divisors (see below), whose sum is σ = 2544085790400. Its totient is φ = 475503644160.

The previous prime is 1200111100213. The next prime is 1200111100249. The reversal of 1200111100220 is 220011110021.

It is a congruent number.

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, 7681280 + ... + 7835960.

It is an arithmetic number, because the mean of its divisors is an integer number (53001787300).

Almost surely, 2^{1200111100220} is an apocalyptic number.

1200111100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200111100220 is an abundant number, since it is smaller than the sum of its proper divisors (1343974690180).

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

1200111100220 is a wasteful number, since it uses less digits than its factorization.

1200111100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158358 (or 158356 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200111100220 its reverse (220011110021), we get a palindrome (1420122210241).

The spelling of 1200111100220 in words is "one trillion, two hundred billion, one hundred eleven million, one hundred thousand, two hundred twenty".