2311000221320 has 64 divisors (see below), whose sum is σ = 5965695031680. Its totient is φ = 789259862016.

The previous prime is 2311000221289. The next prime is 2311000221329. The reversal of 2311000221320 is 231220001132.

It is not an unprimeable number, because it can be changed into a prime (2311000221329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15985574 + ... + 16129493.

It is an arithmetic number, because the mean of its divisors is an integer number (93213984870).

Almost surely, 2^{2311000221320} is an apocalyptic number.

2311000221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311000221320 is an abundant number, since it is smaller than the sum of its proper divisors (3654694810360).

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

2311000221320 is a wasteful number, since it uses less digits than its factorization.

2311000221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32115342 (or 32115338 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2311000221320 its reverse (231220001132), we get a palindrome (2542220222452).

The spelling of 2311000221320 in words is "two trillion, three hundred eleven billion, two hundred twenty-one thousand, three hundred twenty".