21031040001 has 16 divisors (see below), whose sum is σ = 28516993920. Its totient is φ = 13784010240.

The previous prime is 21031039963. The next prime is 21031040003. The reversal of 21031040001 is 10004013012.

It is a happy number.

It is not a de Polignac number, because 21031040001 - 2⁷ = 21031039873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031040003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64666 + ... + 215043.

It is an arithmetic number, because the mean of its divisors is an integer number (1782312120).

Almost surely, 2^21031040001 is an apocalyptic number.

It is an amenable number.

21031040001 is a deficient number, since it is larger than the sum of its proper divisors (7485953919).

21031040001 is a wasteful number, since it uses less digits than its factorization.

21031040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280136.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21031040001 its reverse (10004013012), we get a palindrome (31035053013).

The spelling of 21031040001 in words is "twenty-one billion, thirty-one million, forty thousand, one".