221020110234 has 96 divisors (see below), whose sum is σ = 601599398400. Its totient is φ = 56969546400.

The previous prime is 221020110221. The next prime is 221020110257. The reversal of 221020110234 is 432011020122.

It is a happy number.

221020110234 is a `hidden beast` number, since 221 + 0 + 201 + 10 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 47 ways as a sum of consecutive naturals, for example, 427084 + ... + 790215.

It is an arithmetic number, because the mean of its divisors is an integer number (6266660400).

Almost surely, 2^221020110234 is an apocalyptic number.

221020110234 is an abundant number, since it is smaller than the sum of its proper divisors (380579288166).

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

221020110234 is a wasteful number, since it uses less digits than its factorization.

221020110234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217456 (or 1217453 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221020110234 its reverse (432011020122), we get a palindrome (653031130356).

The spelling of 221020110234 in words is "two hundred twenty-one billion, twenty million, one hundred ten thousand, two hundred thirty-four".