221000020112120 has 32 divisors (see below), whose sum is σ = 497259514019520. Its totient is φ = 88398324708480.

The previous prime is 221000020112033. The next prime is 221000020112129. The reversal of 221000020112120 is 21211020000122.

It is a junction number, because it is equal to n+sod(n) for n = 221000020112095 and 221000020112104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000020112129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50476352 + ... + 54679631.

It is an arithmetic number, because the mean of its divisors is an integer number (15539359813110).

Almost surely, 2^{221000020112120} is an apocalyptic number.

221000020112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000020112120 is an abundant number, since it is smaller than the sum of its proper divisors (276259493907400).

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

221000020112120 is a wasteful number, since it uses less digits than its factorization.

221000020112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105208535 (or 105208531 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221000020112120 its reverse (21211020000122), we get a palindrome (242211040112242).

The spelling of 221000020112120 in words is "two hundred twenty-one trillion, twenty million, one hundred twelve thousand, one hundred twenty".