2100012200001 has 24 divisors (see below), whose sum is σ = 3074840701920. Its totient is φ = 1380971334336.

The previous prime is 2100012199979. The next prime is 2100012200009. The reversal of 2100012200001 is 1000022100012.

It is not a de Polignac number, because 2100012200001 - 2⁶ = 2100012199937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2100012200009) 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, 4455231 + ... + 4903988.

It is an arithmetic number, because the mean of its divisors is an integer number (128118362580).

Almost surely, 2^{2100012200001} is an apocalyptic number.

It is an amenable number.

2100012200001 is a deficient number, since it is larger than the sum of its proper divisors (974828501919).

2100012200001 is a wasteful number, since it uses less digits than its factorization.

2100012200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9359565 (or 9359562 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100012200001 its reverse (1000022100012), we get a palindrome (3100034300013).

The spelling of 2100012200001 in words is "two trillion, one hundred billion, twelve million, two hundred thousand, one".