221100002120120 has 32 divisors (see below), whose sum is σ = 519104352805920. Its totient is φ = 84594783419520.

The previous prime is 221100002120119. The next prime is 221100002120161. The reversal of 221100002120120 is 21021200001122.

It is a junction number, because it is equal to n+sod(n) for n = 221100002120095 and 221100002120104.

It is a congruent number.

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, 120163043711 + ... + 120163045550.

It is an arithmetic number, because the mean of its divisors is an integer number (16222011025185).

Almost surely, 2^{221100002120120} is an apocalyptic number.

221100002120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221100002120120 is an abundant number, since it is smaller than the sum of its proper divisors (298004350685800).

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

221100002120120 is a wasteful number, since it uses less digits than its factorization.

221100002120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240326089295 (or 240326089291 counting only the distinct ones).

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

Adding to 221100002120120 its reverse (21021200001122), we get a palindrome (242121202121242).

The spelling of 221100002120120 in words is "two hundred twenty-one trillion, one hundred billion, two million, one hundred twenty thousand, one hundred twenty".