221101100010 has 112 divisors (see below), whose sum is σ = 681943021056. Its totient is φ = 50537382624.

The previous prime is 221101099931. The next prime is 221101100041. The reversal of 221101100010 is 10001101122.

It is a happy number.

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 = 221101099965 and 221101100001.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2115354 + ... + 2217413.

Almost surely, 2^221101100010 is an apocalyptic number.

221101100010 is an abundant number, since it is smaller than the sum of its proper divisors (460841921046).

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

221101100010 is an equidigital number, since it uses as much as digits as its factorization.

221101100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332799 (or 4332784 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 221101100010 its reverse (10001101122), we get a palindrome (231102201132).

The spelling of 221101100010 in words is "two hundred twenty-one billion, one hundred one million, one hundred thousand, ten".