3111201240 has 128 divisors (see below), whose sum is σ = 10955381760. Its totient is φ = 691905024.

The previous prime is 3111201221. The next prime is 3111201257. The reversal of 3111201240 is 421021113.

3111201240 is digitally balanced in base 2, 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 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, 18972 + ... + 81131.

It is an arithmetic number, because the mean of its divisors is an integer number (85588920).

Almost surely, 2^3111201240 is an apocalyptic number.

3111201240 is a gapful number since it is divisible by the number (30) 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 3111201240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5477690880).

3111201240 is an abundant number, since it is smaller than the sum of its proper divisors (7844180520).

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

3111201240 is a wasteful number, since it uses less digits than its factorization.

3111201240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100161 (or 100157 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3111201240 is about 55778.1430311193. The cubic root of 3111201240 is about 1459.8538103453.

Adding to 3111201240 its reverse (421021113), we get a palindrome (3532222353).

The spelling of 3111201240 in words is "three billion, one hundred eleven million, two hundred one thousand, two hundred forty".