221211241100 has 36 divisors (see below), whose sum is σ = 505293049800. Its totient is φ = 83827416960.

The previous prime is 221211241057. The next prime is 221211241109. The reversal of 221211241100 is 1142112122.

It is not an unprimeable number, because it can be changed into a prime (221211241109) 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, 58211585 + ... + 58215384.

It is an arithmetic number, because the mean of its divisors is an integer number (14035918050).

Almost surely, 2^221211241100 is an apocalyptic number.

221211241100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211241100 is an abundant number, since it is smaller than the sum of its proper divisors (284081808700).

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

221211241100 is a wasteful number, since it uses less digits than its factorization.

221211241100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116427002 (or 116426995 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221211241100 its reverse (1142112122), we get a palindrome (222353353222).

The spelling of 221211241100 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred forty-one thousand, one hundred".