2231222100 has 72 divisors (see below), whose sum is σ = 6630179808. Its totient is φ = 578908800.

The previous prime is 2231222093. The next prime is 2231222107. The reversal of 2231222100 is 12221322.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2231222093) and next prime (2231222107).

It is a super-3 number, since 3×2231222100³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2231222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231222107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89406 + ... + 111605.

Almost surely, 2^2231222100 is an apocalyptic number.

2231222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231222100 is an abundant number, since it is smaller than the sum of its proper divisors (4398957708).

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

2231222100 is a wasteful number, since it uses less digits than its factorization.

2231222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201065 (or 201058 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2231222100 is about 47235.8137433875. The cubic root of 2231222100 is about 1306.7151740230.

Adding to 2231222100 its reverse (12221322), we get a palindrome (2243443422).

It can be divided in two parts, 2231222 and 100, that added together give a palindrome (2231322).

The spelling of 2231222100 in words is "two billion, two hundred thirty-one million, two hundred twenty-two thousand, one hundred".