201210111001001 has 4 divisors (see below), whose sum is σ = 201263924888400. Its totient is φ = 201156297113604.

The previous prime is 201210111000971. The next prime is 201210111001037. The reversal of 201210111001001 is 100100111012102.

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 201210111001001 - 2³⁴ = 201192931131817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201210111001201) 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, 26906938091 + ... + 26906945568.

It is an arithmetic number, because the mean of its divisors is an integer number (50315981222100).

Almost surely, 2^{201210111001001} is an apocalyptic number.

It is an amenable number.

201210111001001 is a deficient number, since it is larger than the sum of its proper divisors (53813887399).

201210111001001 is an equidigital number, since it uses as much as digits as its factorization.

201210111001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53813887398.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 201210111001001 its reverse (100100111012102), we get a palindrome (301310222013103).

The spelling of 201210111001001 in words is "two hundred one trillion, two hundred ten billion, one hundred eleven million, one thousand, one".