221400021110220 has 48 divisors (see below), whose sum is σ = 688800065677920. Its totient is φ = 59040005629248.

The previous prime is 221400021110207. The next prime is 221400021110237. The reversal of 221400021110220 is 22011120004122.

221400021110220 is a `hidden beast` number, since 2 + 21 + 400 + 0 + 2 + 11 + 10 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221400021110193 and 221400021110202.

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, 205000019007 + ... + 205000020086.

It is an arithmetic number, because the mean of its divisors is an integer number (14350001368290).

Almost surely, 2^{221400021110220} is an apocalyptic number.

221400021110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221400021110220 is an abundant number, since it is smaller than the sum of its proper divisors (467400044567700).

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

221400021110220 is a wasteful number, since it uses less digits than its factorization.

221400021110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410000039111 (or 410000039103 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221400021110220 its reverse (22011120004122), we get a palindrome (243411141114342).

The spelling of 221400021110220 in words is "two hundred twenty-one trillion, four hundred billion, twenty-one million, one hundred ten thousand, two hundred twenty".