2100001210001 has 8 divisors (see below), whose sum is σ = 2129662142784. Its totient is φ = 2070342595440.

The previous prime is 2100001209953. The next prime is 2100001210007. The reversal of 2100001210001 is 1000121000012.

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-2100001210001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100001210007) 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, 1287131 + ... + 2420063.

It is an arithmetic number, because the mean of its divisors is an integer number (266207767848).

Almost surely, 2^{2100001210001} is an apocalyptic number.

It is an amenable number.

2100001210001 is a deficient number, since it is larger than the sum of its proper divisors (29660932783).

2100001210001 is a wasteful number, since it uses less digits than its factorization.

2100001210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159111.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 2100001210001 its reverse (1000121000012), we get a palindrome (3100122210013).

It can be divided in two parts, 21000012 and 10001, that multiplied together give a palindrome (210021120012).

The spelling of 2100001210001 in words is "two trillion, one hundred billion, one million, two hundred ten thousand, one".