222121704 has 96 divisors (see below), whose sum is σ = 680032800. Its totient is φ = 60117120.

The previous prime is 222121687. The next prime is 222121717. The reversal of 222121704 is 407121222.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 17374 + ... + 27314.

It is an arithmetic number, because the mean of its divisors is an integer number (7083675).

Almost surely, 2^222121704 is an apocalyptic number.

222121704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222121704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340016400).

222121704 is an abundant number, since it is smaller than the sum of its proper divisors (457911096).

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

222121704 is a wasteful number, since it uses less digits than its factorization.

222121704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9983 (or 9972 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 222121704 is about 14903.7479849869. The cubic root of 222121704 is about 605.6155236381.

Adding to 222121704 its reverse (407121222), we get a palindrome (629242926).

The spelling of 222121704 in words is "two hundred twenty-two million, one hundred twenty-one thousand, seven hundred four".