1042220100 has 36 divisors (see below), whose sum is σ = 3015491024. Its totient is φ = 277925280.

The previous prime is 1042220099. The next prime is 1042220117. The reversal of 1042220100 is 10222401.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 11 ways as a sum of consecutive naturals, for example, 1736734 + ... + 1737333.

Almost surely, 2^1042220100 is an apocalyptic number.

1042220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042220100 is an abundant number, since it is smaller than the sum of its proper divisors (1973270924).

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

1042220100 is a wasteful number, since it uses less digits than its factorization.

1042220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474084 (or 3474077 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1042220100 is about 32283.4338322304. The cubic root of 1042220100 is about 1013.8798257886.

Adding to 1042220100 its reverse (10222401), we get a palindrome (1052442501).

The spelling of 1042220100 in words is "one billion, forty-two million, two hundred twenty thousand, one hundred".