201001000122101 has 24 divisors (see below), whose sum is σ = 211156585486560. Its totient is φ = 191210296358016.

The previous prime is 201001000122089. The next prime is 201001000122103. The reversal of 201001000122101 is 101221000100102.

It is a de Polignac number, because none of the positive numbers 2^k-201001000122101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001000122103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10632710 + ... + 22694856.

It is an arithmetic number, because the mean of its divisors is an integer number (8798191061940).

Almost surely, 2^{201001000122101} is an apocalyptic number.

It is an amenable number.

201001000122101 is a deficient number, since it is larger than the sum of its proper divisors (10155585364459).

201001000122101 is an equidigital number, since it uses as much as digits as its factorization.

201001000122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12062405 (or 12062332 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201001000122101 its reverse (101221000100102), we get a palindrome (302222000222203).

The spelling of 201001000122101 in words is "two hundred one trillion, one billion, one hundred twenty-two thousand, one hundred one".