21001001130 has 48 divisors (see below), whose sum is σ = 55260485280. Its totient is φ = 5532791904.

The previous prime is 21001001111. The next prime is 21001001141. The reversal of 21001001130 is 3110010012.

It is a super-2 number, since 2×21001001130² (a number of 21 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1398220 + ... + 1413159.

It is an arithmetic number, because the mean of its divisors is an integer number (1151260110).

Almost surely, 2^21001001130 is an apocalyptic number.

21001001130 is an abundant number, since it is smaller than the sum of its proper divisors (34259484150).

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

21001001130 is a wasteful number, since it uses less digits than its factorization.

21001001130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811475 (or 2811472 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 21001001130 its reverse (3110010012), we get a palindrome (24111011142).

The spelling of 21001001130 in words is "twenty-one billion, one million, one thousand, one hundred thirty".