1000012120 has 16 divisors (see below), whose sum is σ = 2250027360. Its totient is φ = 400004832.

The previous prime is 1000012037. The next prime is 1000012121. The reversal of 1000012120 is 212100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000012121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12500112 + ... + 12500191.

It is an arithmetic number, because the mean of its divisors is an integer number (140626710).

Almost surely, 2^1000012120 is an apocalyptic number.

1000012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000012120 is an abundant number, since it is smaller than the sum of its proper divisors (1250015240).

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

1000012120 is a wasteful number, since it uses less digits than its factorization.

1000012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25000314 (or 25000310 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1000012120 is about 31622.9682351294. The cubic root of 1000012120 is about 1000.0040399837.

Adding to 1000012120 its reverse (212100001), we get a palindrome (1212112121).

The spelling of 1000012120 in words is "one billion, twelve thousand, one hundred twenty".