221102220212120 has 64 divisors (see below), whose sum is σ = 535762431116640. Its totient is φ = 81635496192000.

The previous prime is 221102220212087. The next prime is 221102220212123. The reversal of 221102220212120 is 21212022201122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221102220212092 and 221102220212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102220212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13122080 + ... + 24786960.

Almost surely, 2^{221102220212120} is an apocalyptic number.

221102220212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102220212120 is an abundant number, since it is smaller than the sum of its proper divisors (314660210904520).

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

221102220212120 is a wasteful number, since it uses less digits than its factorization.

221102220212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11701356 (or 11701352 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221102220212120 its reverse (21212022201122), we get a palindrome (242314242413242).

The spelling of 221102220212120 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty".