1011200420 has 48 divisors (see below), whose sum is σ = 2211678000. Its totient is φ = 387878400.

The previous prime is 1011200369. The next prime is 1011200429. The reversal of 1011200420 is 240021101.

It can be written as a sum of positive squares in 8 ways, for example, as 16176484 + 995023936 = 4022^2 + 31544^2 .

It is not an unprimeable number, because it can be changed into a prime (1011200429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80570 + ... + 92270.

It is an arithmetic number, because the mean of its divisors is an integer number (46076625).

Almost surely, 2^1011200420 is an apocalyptic number.

1011200420 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 1011200420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105839000).

1011200420 is an abundant number, since it is smaller than the sum of its proper divisors (1200477580).

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

1011200420 is a wasteful number, since it uses less digits than its factorization.

1011200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11888 (or 11886 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1011200420 is about 31799.3776668664. The cubic root of 1011200420 is about 1003.7196206015.

Adding to 1011200420 its reverse (240021101), we get a palindrome (1251221521).

The spelling of 1011200420 in words is "one billion, eleven million, two hundred thousand, four hundred twenty".