221101221100 has 36 divisors (see below), whose sum is σ = 489997950624. Its totient is φ = 86558774080.

The previous prime is 221101221083. The next prime is 221101221127. The reversal of 221101221100 is 1122101122.

It is a super-2 number, since 2×221101221100² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23516707 + ... + 23526106.

It is an arithmetic number, because the mean of its divisors is an integer number (13611054184).

Almost surely, 2^221101221100 is an apocalyptic number.

221101221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101221100 is an abundant number, since it is smaller than the sum of its proper divisors (268896729524).

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

221101221100 is a wasteful number, since it uses less digits than its factorization.

221101221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47042874 (or 47042867 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221101221100 its reverse (1122101122), we get a palindrome (222223322222).

The spelling of 221101221100 in words is "two hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, one hundred".