1201220110120 has 64 divisors (see below), whose sum is σ = 2747058696000. Its totient is φ = 472630878720.

The previous prime is 1201220110081. The next prime is 1201220110127. The reversal of 1201220110120 is 210110221021.

It is a self number, because there is not a number n which added to its sum of digits gives 1201220110120.

It is not an unprimeable number, because it can be changed into a prime (1201220110127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1527556 + ... + 2176204.

It is an arithmetic number, because the mean of its divisors is an integer number (42922792125).

Almost surely, 2^{1201220110120} is an apocalyptic number.

1201220110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201220110120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373529348000).

1201220110120 is an abundant number, since it is smaller than the sum of its proper divisors (1545838585880).

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

1201220110120 is a wasteful number, since it uses less digits than its factorization.

1201220110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649418 (or 649414 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201220110120 its reverse (210110221021), we get a palindrome (1411330331141).

The spelling of 1201220110120 in words is "one trillion, two hundred one billion, two hundred twenty million, one hundred ten thousand, one hundred twenty".