222220100 has 36 divisors (see below), whose sum is σ = 482966484. Its totient is φ = 88750080.

The previous prime is 222220081. The next prime is 222220109. The reversal of 222220100 is 1022222.

It can be written as a sum of positive squares in 6 ways, for example, as 6071296 + 216148804 = 2464^2 + 14702^2 .

It is not an unprimeable number, because it can be changed into a prime (222220109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84404 + ... + 86996.

Almost surely, 2^222220100 is an apocalyptic number.

222220100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222220100 is an abundant number, since it is smaller than the sum of its proper divisors (260746384).

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

222220100 is a wasteful number, since it uses less digits than its factorization.

222220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464 (or 3457 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 222220100 is about 14907.0486683314. The cubic root of 222220100 is about 605.7049361044.

Adding to 222220100 its reverse (1022222), we get a palindrome (223242322).

It can be divided in two parts, 2222 and 20100, that added together give a palindrome (22322).

The spelling of 222220100 in words is "two hundred twenty-two million, two hundred twenty thousand, one hundred".