1200401120 has 48 divisors (see below), whose sum is σ = 2840806080. Its totient is φ = 479337984.

The previous prime is 1200401113. The next prime is 1200401131. The reversal of 1200401120 is 211040021.

It is a congruent number.

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, 91961 + ... + 104199.

It is an arithmetic number, because the mean of its divisors is an integer number (59183460).

Almost surely, 2^1200401120 is an apocalyptic number.

1200401120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200401120 is an abundant number, since it is smaller than the sum of its proper divisors (1640404960).

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

1200401120 is a wasteful number, since it uses less digits than its factorization.

1200401120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12867 (or 12859 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1200401120 is about 34646.8053361345. The cubic root of 1200401120 is about 1062.7769597715.

Adding to 1200401120 its reverse (211040021), we get a palindrome (1411441141).

The spelling of 1200401120 in words is "one billion, two hundred million, four hundred one thousand, one hundred twenty".