221201112110120 has 32 divisors (see below), whose sum is σ = 497936275338600. Its totient is φ = 88438885183488.

The previous prime is 221201112110093. The next prime is 221201112110179. The reversal of 221201112110120 is 21011211102122.

It can be written as a sum of positive squares in 4 ways, for example, as 146103739926244 + 75097372183876 = 12087338^2 + 8665874^2 .

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, 1298653169 + ... + 1298823488.

Almost surely, 2^{221201112110120} is an apocalyptic number.

221201112110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201112110120 is an abundant number, since it is smaller than the sum of its proper divisors (276735163228480).

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

221201112110120 is a wasteful number, since it uses less digits than its factorization.

221201112110120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597478797 (or 2597478793 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221201112110120 its reverse (21011211102122), we get a palindrome (242212323212242).

The spelling of 221201112110120 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twelve million, one hundred ten thousand, one hundred twenty".