21131203001 has 8 divisors (see below), whose sum is σ = 22265836800. Its totient is φ = 19998815760.

The previous prime is 21131202991. The next prime is 21131203013. The reversal of 21131203001 is 10030213112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21131203001 - 2¹⁴ = 21131186617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131203021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 542306 + ... + 579963.

It is an arithmetic number, because the mean of its divisors is an integer number (2783229600).

Almost surely, 2^21131203001 is an apocalyptic number.

It is an amenable number.

21131203001 is a deficient number, since it is larger than the sum of its proper divisors (1134633799).

21131203001 is a wasteful number, since it uses less digits than its factorization.

21131203001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123279.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21131203001 its reverse (10030213112), we get a palindrome (31161416113).

The spelling of 21131203001 in words is "twenty-one billion, one hundred thirty-one million, two hundred three thousand, one".