221010010100 has 72 divisors (see below), whose sum is σ = 527310916608. Its totient is φ = 79734412800.

The previous prime is 221010010097. The next prime is 221010010121. The reversal of 221010010100 is 1010010122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 651317 + ... + 930716.

Almost surely, 2^221010010100 is an apocalyptic number.

221010010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010010100 is an abundant number, since it is smaller than the sum of its proper divisors (306300906508).

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

221010010100 is a wasteful number, since it uses less digits than its factorization.

221010010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582185 (or 1582178 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 221010010100 its reverse (1010010122), we get a palindrome (222020020222).

The spelling of 221010010100 in words is "two hundred twenty-one billion, ten million, ten thousand, one hundred".