221001220010100 has 72 divisors (see below), whose sum is σ = 677043737552448. Its totient is φ = 55466972864000.

The previous prime is 221001220010041. The next prime is 221001220010111. The reversal of 221001220010100 is 1010022100122.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21666781176 + ... + 21666791375.

It is an arithmetic number, because the mean of its divisors is an integer number (9403385243784).

Almost surely, 2^{221001220010100} is an apocalyptic number.

221001220010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001220010100 is an abundant number, since it is smaller than the sum of its proper divisors (456042517542348).

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

221001220010100 is a wasteful number, since it uses less digits than its factorization.

221001220010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43333572585 (or 43333572578 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221001220010100 its reverse (1010022100122), we get a palindrome (222011242110222).

The spelling of 221001220010100 in words is "two hundred twenty-one trillion, one billion, two hundred twenty million, ten thousand, one hundred".