1200051020 has 96 divisors (see below), whose sum is σ = 3063621120. Its totient is φ = 385689600.

The previous prime is 1200051011. The next prime is 1200051037. The reversal of 1200051020 is 201500021.

It is a junction number, because it is equal to n+sod(n) for n = 1200050992 and 1200051010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255695 + ... + 260345.

It is an arithmetic number, because the mean of its divisors is an integer number (31912720).

Almost surely, 2^1200051020 is an apocalyptic number.

1200051020 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 1200051020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1531810560).

1200051020 is an abundant number, since it is smaller than the sum of its proper divisors (1863570100).

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

1200051020 is a wasteful number, since it uses less digits than its factorization.

1200051020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4783 (or 4781 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1200051020 is about 34641.7525538186. The cubic root of 1200051020 is about 1062.6736292026.

Adding to 1200051020 its reverse (201500021), we get a palindrome (1401551041).

The spelling of 1200051020 in words is "one billion, two hundred million, fifty-one thousand, twenty".