221020100110 has 16 divisors (see below), whose sum is σ = 415133405856. Its totient is φ = 84564212128.

The previous prime is 221020100083. The next prime is 221020100117. The reversal of 221020100110 is 11001020122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020100117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480478249 + ... + 480478708.

It is an arithmetic number, because the mean of its divisors is an integer number (25945837866).

Almost surely, 2^221020100110 is an apocalyptic number.

221020100110 is a deficient number, since it is larger than the sum of its proper divisors (194113305746).

221020100110 is a wasteful number, since it uses less digits than its factorization.

221020100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960956987.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221020100110 its reverse (11001020122), we get a palindrome (232021120232).

The spelling of 221020100110 in words is "two hundred twenty-one billion, twenty million, one hundred thousand, one hundred ten".