210001011001 has 4 divisors (see below), whose sum is σ = 212039855872. Its totient is φ = 207962166132.

The previous prime is 210001010987. The next prime is 210001011007. The reversal of 210001011001 is 100110100012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210001011001 - 2¹⁹ = 210000486713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210001011007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019422281 + ... + 1019422486.

It is an arithmetic number, because the mean of its divisors is an integer number (53009963968).

Almost surely, 2^210001011001 is an apocalyptic number.

It is an amenable number.

210001011001 is a deficient number, since it is larger than the sum of its proper divisors (2038844871).

210001011001 is a wasteful number, since it uses less digits than its factorization.

210001011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038844870.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 210001011001 its reverse (100110100012), we get a palindrome (310111111013).

The spelling of 210001011001 in words is "two hundred ten billion, one million, eleven thousand, one".