1120001000 has 32 divisors (see below), whose sum is σ = 2620804680. Its totient is φ = 448000000.

The previous prime is 1120000991. The next prime is 1120001033. The reversal of 1120001000 is 1000211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 612760516 + 507240484 = 24754^2 + 22522^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559001 + ... + 561000.

Almost surely, 2^1120001000 is an apocalyptic number.

1120001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120001000 is an abundant number, since it is smaller than the sum of its proper divisors (1500803680).

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

1120001000 is a wasteful number, since it uses less digits than its factorization.

1120001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120022 (or 1120008 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1120001000 is about 33466.4160017173. The cubic root of 1120001000 is about 1038.4991294472.

Adding to 1120001000 its reverse (1000211), we get a palindrome (1121001211).

The spelling of 1120001000 in words is "one billion, one hundred twenty million, one thousand".