221311041320 has 64 divisors (see below), whose sum is σ = 515707430400. Its totient is φ = 85420572160.

The previous prime is 221311041313. The next prime is 221311041349. The reversal of 221311041320 is 23140113122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221311041292 and 221311041301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695525 + ... + 962484.

It is an arithmetic number, because the mean of its divisors is an integer number (8057928600).

Almost surely, 2^221311041320 is an apocalyptic number.

221311041320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221311041320 is an abundant number, since it is smaller than the sum of its proper divisors (294396389080).

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

221311041320 is a wasteful number, since it uses less digits than its factorization.

221311041320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658138 (or 1658134 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221311041320 its reverse (23140113122), we get a palindrome (244451154442).

The spelling of 221311041320 in words is "two hundred twenty-one billion, three hundred eleven million, forty-one thousand, three hundred twenty".