1200310020 has 288 divisors, whose sum is σ = 4524269568. Its totient is φ = 250822656.

The previous prime is 1200309989. The next prime is 1200310021. The reversal of 1200310020 is 200130021.

It is a happy number.

It is a super-2 number, since 2×1200310020² = 2881488288224800800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1200309984 and 1200310011.

It is not an unprimeable number, because it can be changed into a prime (1200310021) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 2079972 + ... + 2080548.

Almost surely, 2^1200310020 is an apocalyptic number.

1200310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200310020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262134784).

1200310020 is an abundant number, since it is smaller than the sum of its proper divisors (3323959548).

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

1200310020 is a wasteful number, since it uses less digits than its factorization.

1200310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1200310020 is about 34645.4906156631. The cubic root of 1200310020 is about 1062.7500739168.

Adding to 1200310020 its reverse (200130021), we get a palindrome (1400440041).

The spelling of 1200310020 in words is "one billion, two hundred million, three hundred ten thousand, twenty".