221140143020 has 24 divisors (see below), whose sum is σ = 464959979568. Its totient is φ = 88348308800.

The previous prime is 221140143013. The next prime is 221140143089. The reversal of 221140143020 is 20341041122.

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 = 221140142983 and 221140143001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6717446 + ... + 6750285.

It is an arithmetic number, because the mean of its divisors is an integer number (19373332482).

Almost surely, 2^221140143020 is an apocalyptic number.

221140143020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221140143020 is an abundant number, since it is smaller than the sum of its proper divisors (243819836548).

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

221140143020 is a wasteful number, since it uses less digits than its factorization.

221140143020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468561 (or 13468559 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221140143020 its reverse (20341041122), we get a palindrome (241481184142).

The spelling of 221140143020 in words is "two hundred twenty-one billion, one hundred forty million, one hundred forty-three thousand, twenty".