1201320042120 has 192 divisors, whose sum is σ = 4260077115840. Its totient is φ = 291170880000.

The previous prime is 1201320042077. The next prime is 1201320042121. The reversal of 1201320042120 is 212400231021.

It is a happy number.

1201320042120 is a `hidden beast` number, since 1 + 20 + 1 + 3 + 200 + 421 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1201320042093 and 1201320042102.

It is not an unprimeable number, because it can be changed into a prime (1201320042121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21756387 + ... + 21811533.

It is an arithmetic number, because the mean of its divisors is an integer number (22187901645).

Almost surely, 2^{1201320042120} is an apocalyptic number.

1201320042120 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 1201320042120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2130038557920).

1201320042120 is an abundant number, since it is smaller than the sum of its proper divisors (3058757073720).

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

1201320042120 is a wasteful number, since it uses less digits than its factorization.

1201320042120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60676 (or 60669 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1201320042120 its reverse (212400231021), we get a palindrome (1413720273141).

The spelling of 1201320042120 in words is "one trillion, two hundred one billion, three hundred twenty million, forty-two thousand, one hundred twenty".