21130010001 has 40 divisors (see below), whose sum is σ = 32984375424. Its totient is φ = 13454812800.

The previous prime is 21130009993. The next prime is 21130010021. The reversal of 21130010001 is 10001003112.

It is not a de Polignac number, because 21130010001 - 2³ = 21130009993 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21130010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1346601 + ... + 1362201.

Almost surely, 2^21130010001 is an apocalyptic number.

It is an amenable number.

21130010001 is a deficient number, since it is larger than the sum of its proper divisors (11854365423).

21130010001 is a wasteful number, since it uses less digits than its factorization.

21130010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16363 (or 16354 counting only the distinct ones).

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

Adding to 21130010001 its reverse (10001003112), we get a palindrome (31131013113).

The spelling of 21130010001 in words is "twenty-one billion, one hundred thirty million, ten thousand, one".