1011002000 has 40 divisors (see below), whose sum is σ = 2444607672. Its totient is φ = 404400000.

The previous prime is 1011001987. The next prime is 1011002029. The reversal of 1011002000 is 2001101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16384 + 1010985616 = 128^2 + 31796^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 250751 + ... + 254750.

Almost surely, 2^1011002000 is an apocalyptic number.

1011002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011002000 is an abundant number, since it is smaller than the sum of its proper divisors (1433605672).

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

1011002000 is an equidigital number, since it uses as much as digits as its factorization.

1011002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505524 (or 505508 counting only the distinct ones).

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

The square root of 1011002000 is about 31796.2576414269. The cubic root of 1011002000 is about 1003.6539656067.

Adding to 1011002000 its reverse (2001101), we get a palindrome (1013003101).

The spelling of 1011002000 in words is "one billion, eleven million, two thousand".