221022122120 has 32 divisors (see below), whose sum is σ = 498250681920. Its totient is φ = 88239798720.

The previous prime is 221022122077. The next prime is 221022122129. The reversal of 221022122120 is 21221220122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221022122129) 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, 5261636 + ... + 5303475.

It is an arithmetic number, because the mean of its divisors is an integer number (15570333810).

Almost surely, 2^221022122120 is an apocalyptic number.

221022122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022122120 is an abundant number, since it is smaller than the sum of its proper divisors (277228559800).

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

221022122120 is a wasteful number, since it uses less digits than its factorization.

221022122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565645 (or 10565641 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221022122120 its reverse (21221220122), we get a palindrome (242243342242).

The spelling of 221022122120 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, one hundred twenty".