1242222000 has 80 divisors (see below), whose sum is σ = 4004943072. Its totient is φ = 331257600.

The previous prime is 1242221999. The next prime is 1242222017. The reversal of 1242222000 is 2222421.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97519 + ... + 109518.

Almost surely, 2^1242222000 is an apocalyptic number.

1242222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242222000 is an abundant number, since it is smaller than the sum of its proper divisors (2762721072).

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

1242222000 is a wasteful number, since it uses less digits than its factorization.

1242222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207063 (or 207047 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1242222000 is about 35245.1698818434. The cubic root of 1242222000 is about 1074.9784023063.

Adding to 1242222000 its reverse (2222421), we get a palindrome (1244444421).

The spelling of 1242222000 in words is "one billion, two hundred forty-two million, two hundred twenty-two thousand".