221022010100 has 36 divisors (see below), whose sum is σ = 480320132544. Its totient is φ = 88279334880.

The previous prime is 221022010063. The next prime is 221022010103. The reversal of 221022010100 is 1010220122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022010103) 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, 1549724 + ... + 1686323.

It is an arithmetic number, because the mean of its divisors is an integer number (13342225904).

Almost surely, 2^221022010100 is an apocalyptic number.

221022010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022010100 is an abundant number, since it is smaller than the sum of its proper divisors (259298122444).

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

221022010100 is a wasteful number, since it uses less digits than its factorization.

221022010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236744 (or 3236737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221022010100 its reverse (1010220122), we get a palindrome (222032230222).

The spelling of 221022010100 in words is "two hundred twenty-one billion, twenty-two million, ten thousand, one hundred".