221222123010 has 48 divisors (see below), whose sum is σ = 657345738816. Its totient is φ = 50565056544.

The previous prime is 221222122997. The next prime is 221222123069. The reversal of 221222123010 is 10321222122.

221222123010 is a `hidden beast` number, since 2 + 212 + 221 + 230 + 1 + 0 = 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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175572484 + ... + 175573743.

It is an arithmetic number, because the mean of its divisors is an integer number (13694702892).

Almost surely, 2^221222123010 is an apocalyptic number.

221222123010 is an abundant number, since it is smaller than the sum of its proper divisors (436123615806).

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

221222123010 is a wasteful number, since it uses less digits than its factorization.

221222123010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351146247 (or 351146244 counting only the distinct ones).

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

Adding to 221222123010 its reverse (10321222122), we get a palindrome (231543345132).

The spelling of 221222123010 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-three thousand, ten".