2100012200221 has 32 divisors (see below), whose sum is σ = 2320186208256. Its totient is φ = 1888599000000.

The previous prime is 2100012200203. The next prime is 2100012200239. The reversal of 2100012200221 is 1220022100012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2100012200203) and next prime (2100012200239).

It is a cyclic number.

It is not a de Polignac number, because 2100012200221 - 2¹¹ = 2100012198173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100012200521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415759146 + ... + 415764196.

It is an arithmetic number, because the mean of its divisors is an integer number (72505819008).

Almost surely, 2^{2100012200221} is an apocalyptic number.

It is an amenable number.

2100012200221 is a deficient number, since it is larger than the sum of its proper divisors (220174008035).

2100012200221 is a wasteful number, since it uses less digits than its factorization.

2100012200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2100012200221 its reverse (1220022100012), we get a palindrome (3320034300233).

The spelling of 2100012200221 in words is "two trillion, one hundred billion, twelve million, two hundred thousand, two hundred twenty-one".