21001031133001 has 8 divisors (see below), whose sum is σ = 21007252797440. Its totient is φ = 20994810243552.

The previous prime is 21001031132951. The next prime is 21001031133031. The reversal of 21001031133001 is 10033113010012.

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 21001031133001 - 2³³ = 20992441198409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001031133031) 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 7 ways as a sum of consecutive naturals, for example, 56440501 + ... + 56811373.

It is an arithmetic number, because the mean of its divisors is an integer number (2625906599680).

Almost surely, 2^{21001031133001} is an apocalyptic number.

It is an amenable number.

21001031133001 is a deficient number, since it is larger than the sum of its proper divisors (6221664439).

21001031133001 is a wasteful number, since it uses less digits than its factorization.

21001031133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387495.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21001031133001 its reverse (10033113010012), we get a palindrome (31034144143013).

The spelling of 21001031133001 in words is "twenty-one trillion, one billion, thirty-one million, one hundred thirty-three thousand, one".