210001101001001 has 8 divisors (see below), whose sum is σ = 214886111119680. Its totient is φ = 205116148318032.

The previous prime is 210001101000989. The next prime is 210001101001007. The reversal of 210001101001001 is 100100101100012.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210001101001001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210001101001001.

It is not an unprimeable number, because it can be changed into a prime (210001101001007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6916970 + ... + 21629763.

It is an arithmetic number, because the mean of its divisors is an integer number (26860763889960).

Almost surely, 2^{210001101001001} is an apocalyptic number.

It is an amenable number.

210001101001001 is a deficient number, since it is larger than the sum of its proper divisors (4885010118679).

210001101001001 is a wasteful number, since it uses less digits than its factorization.

210001101001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28717855.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 210001101001001 its reverse (100100101100012), we get a palindrome (310101202101013).

The spelling of 210001101001001 in words is "two hundred ten trillion, one billion, one hundred one million, one thousand, one".