21131033001 has 16 divisors (see below), whose sum is σ = 30352202496. Its totient is φ = 12999338496.

The previous prime is 21131032991. The next prime is 21131033003. The reversal of 21131033001 is 10033013112.

It is not a de Polignac number, because 21131033001 - 2⁵ = 21131032969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21131033003) 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 15 ways as a sum of consecutive naturals, for example, 28281 + ... + 207513.

It is an arithmetic number, because the mean of its divisors is an integer number (1897012656).

Almost surely, 2^21131033001 is an apocalyptic number.

It is an amenable number.

21131033001 is a deficient number, since it is larger than the sum of its proper divisors (9221169495).

21131033001 is a wasteful number, since it uses less digits than its factorization.

21131033001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182272.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21131033001 its reverse (10033013112), we get a palindrome (31164046113).

The spelling of 21131033001 in words is "twenty-one billion, one hundred thirty-one million, thirty-three thousand, one".