221100200010 has 24 divisors (see below), whose sum is σ = 574860520260. Its totient is φ = 58960053312.

The previous prime is 221100199981. The next prime is 221100200033. The reversal of 221100200010 is 10002001122.

It can be written as a sum of positive squares in 2 ways, for example, as 219229031961 + 1871168049 = 468219^2 + 43257^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221100199965 and 221100200001.

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, 1228334355 + ... + 1228334534.

Almost surely, 2^221100200010 is an apocalyptic number.

221100200010 is an abundant number, since it is smaller than the sum of its proper divisors (353760320250).

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

221100200010 is a wasteful number, since it uses less digits than its factorization.

221100200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456668902 (or 2456668899 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 221100200010 its reverse (10002001122), we get a palindrome (231102201132).

The spelling of 221100200010 in words is "two hundred twenty-one billion, one hundred million, two hundred thousand, ten".