1201323120 has 160 divisors (see below), whose sum is σ = 3903178752. Its totient is φ = 305074176.

The previous prime is 1201323119. The next prime is 1201323163. The reversal of 1201323120 is 213231021.

1201323120 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201323120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2025544 + ... + 2026136.

Almost surely, 2^1201323120 is an apocalyptic number.

1201323120 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 1201323120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951589376).

1201323120 is an abundant number, since it is smaller than the sum of its proper divisors (2701855632).

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

1201323120 is a wasteful number, since it uses less digits than its factorization.

1201323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1201323120 is about 34660.1084822307. The cubic root of 1201323120 is about 1063.0489881719.

Adding to 1201323120 its reverse (213231021), we get a palindrome (1414554141).

The spelling of 1201323120 in words is "one billion, two hundred one million, three hundred twenty-three thousand, one hundred twenty".