1222222000 has 40 divisors (see below), whose sum is σ = 2955337632. Its totient is φ = 488888000.

The previous prime is 1222221997. The next prime is 1222222003. The reversal of 1222222000 is 2222221.

It is an interprime number because it is at equal distance from previous prime (1222221997) and next prime (1222222003).

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1222222003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303556 + ... + 307555.

Almost surely, 2^1222222000 is an apocalyptic number.

1222222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222222000 is an abundant number, since it is smaller than the sum of its proper divisors (1733115632).

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

1222222000 is an equidigital number, since it uses as much as digits as its factorization.

1222222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611134 (or 611118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1222222000 is about 34960.2917607963. The cubic root of 1222222000 is about 1069.1780451999.

Adding to 1222222000 its reverse (2222221), we get a palindrome (1224444221).

The spelling of 1222222000 in words is "one billion, two hundred twenty-two million, two hundred twenty-two thousand".