221001021112220 has 12 divisors (see below), whose sum is σ = 464102144335704. Its totient is φ = 88400408444880.

The previous prime is 221001021112171. The next prime is 221001021112247. The reversal of 221001021112220 is 22211120100122.

It is a super-3 number, since 3×221001021112220³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525025527786 + ... + 5525025527825.

It is an arithmetic number, because the mean of its divisors is an integer number (38675178694642).

Almost surely, 2^{221001021112220} is an apocalyptic number.

221001021112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001021112220 is an abundant number, since it is smaller than the sum of its proper divisors (243101123223484).

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

221001021112220 is a wasteful number, since it uses less digits than its factorization.

221001021112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050051055620 (or 11050051055618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221001021112220 its reverse (22211120100122), we get a palindrome (243212141212342).

The spelling of 221001021112220 in words is "two hundred twenty-one trillion, one billion, twenty-one million, one hundred twelve thousand, two hundred twenty".