2311213120 has 56 divisors (see below), whose sum is σ = 5507952408. Its totient is φ = 923750400.

The previous prime is 2311213057. The next prime is 2311213129. The reversal of 2311213120 is 213121132.

It can be written as a sum of positive squares in 4 ways, for example, as 295936 + 2310917184 = 544^2 + 48072^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2311213094 and 2311213103.

It is not an unprimeable number, because it can be changed into a prime (2311213129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593580 + ... + 597460.

It is an arithmetic number, because the mean of its divisors is an integer number (98356293).

Almost surely, 2^2311213120 is an apocalyptic number.

2311213120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311213120 is an abundant number, since it is smaller than the sum of its proper divisors (3196739288).

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

2311213120 is a wasteful number, since it uses less digits than its factorization.

2311213120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759 (or 5749 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2311213120 is about 48075.0779510548. The cubic root of 2311213120 is about 1322.1477737377.

Adding to 2311213120 its reverse (213121132), we get a palindrome (2524334252).

The spelling of 2311213120 in words is "two billion, three hundred eleven million, two hundred thirteen thousand, one hundred twenty".