1201221221120 has 72 divisors (see below), whose sum is σ = 2877707374080. Its totient is φ = 480420495360.

The previous prime is 1201221221077. The next prime is 1201221221197. The reversal of 1201221221120 is 211221221021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9523265 + ... + 9648575.

Almost surely, 2^{1201221221120} is an apocalyptic number.

1201221221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201221221120 is an abundant number, since it is smaller than the sum of its proper divisors (1676486152960).

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

1201221221120 is an equidigital number, since it uses as much as digits as its factorization.

1201221221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132821 (or 132807 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1201221221120 its reverse (211221221021), we get a palindrome (1412442442141).

Subtracting from 1201221221120 its reverse (211221221021), we obtain a palindrome (990000000099).

The spelling of 1201221221120 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty".