2111313721 has 8 divisors (see below), whose sum is σ = 2365501824. Its totient is φ = 1867500720.

The previous prime is 2111313719. The next prime is 2111313731. The reversal of 2111313721 is 1273131112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111313721 - 2¹ = 2111313719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111313692 and 2111313701.

It is not an unprimeable number, because it can be changed into a prime (2111313731) 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, 2593345 + ... + 2594158.

It is an arithmetic number, because the mean of its divisors is an integer number (295687728).

Almost surely, 2^2111313721 is an apocalyptic number.

It is an amenable number.

2111313721 is a deficient number, since it is larger than the sum of its proper divisors (254188103).

2111313721 is a wasteful number, since it uses less digits than its factorization.

2111313721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187551.

The product of its digits is 252, while the sum is 22.

The square root of 2111313721 is about 45949.0339506719. The cubic root of 2111313721 is about 1282.8747482910.

Adding to 2111313721 its reverse (1273131112), we get a palindrome (3384444833).

The spelling of 2111313721 in words is "two billion, one hundred eleven million, three hundred thirteen thousand, seven hundred twenty-one".