221201022201100 has 36 divisors (see below), whose sum is σ = 481240167408000. Its totient is φ = 88252952800960.

The previous prime is 221201022201097. The next prime is 221201022201109. The reversal of 221201022201100 is 1102220102122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221201022201109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2843161900 + ... + 2843239699.

It is an arithmetic number, because the mean of its divisors is an integer number (13367782428000).

Almost surely, 2^{221201022201100} is an apocalyptic number.

221201022201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201022201100 is an abundant number, since it is smaller than the sum of its proper divisors (260039145206900).

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

221201022201100 is a wasteful number, since it uses less digits than its factorization.

221201022201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5686402002 (or 5686401995 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221201022201100 its reverse (1102220102122), we get a palindrome (222303242303222).

The spelling of 221201022201100 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-two million, two hundred one thousand, one hundred".