222121100110 has 64 divisors (see below), whose sum is σ = 500150738304. Its totient is φ = 69145228800.

The previous prime is 222121100081. The next prime is 222121100119. The reversal of 222121100110 is 11001121222.

It is a super-2 number, since 2×222121100110² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121100119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1945221 + ... + 2056240.

It is an arithmetic number, because the mean of its divisors is an integer number (7814855286).

Almost surely, 2^222121100110 is an apocalyptic number.

222121100110 is an abundant number, since it is smaller than the sum of its proper divisors (278029638194).

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

222121100110 is a wasteful number, since it uses less digits than its factorization.

222121100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001549.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 222121100110 its reverse (11001121222), we get a palindrome (233122221332).

The spelling of 222121100110 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, one hundred ten".