120111001200 has 120 divisors (see below), whose sum is σ = 427506231600. Its totient is φ = 32029597440.

The previous prime is 120111001183. The next prime is 120111001201. The reversal of 120111001200 is 2100111021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111001201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5549895 + ... + 5571494.

It is an arithmetic number, because the mean of its divisors is an integer number (3562551930).

Almost surely, 2^120111001200 is an apocalyptic number.

120111001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120111001200 is an abundant number, since it is smaller than the sum of its proper divisors (307395230400).

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

120111001200 is a wasteful number, since it uses less digits than its factorization.

120111001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121416 (or 11121399 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120111001200 its reverse (2100111021), we get a palindrome (122211112221).

The spelling of 120111001200 in words is "one hundred twenty billion, one hundred eleven million, one thousand, two hundred".