2101212022201 has 4 divisors (see below), whose sum is σ = 2101546776292. Its totient is φ = 2100877268112.

The previous prime is 2101212022187. The next prime is 2101212022219. The reversal of 2101212022201 is 1022202121012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1861107122176 + 240104900025 = 1364224^2 + 490005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101212022201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101212022271) 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, 167367630 + ... + 167380183.

It is an arithmetic number, because the mean of its divisors is an integer number (525386694073).

Almost surely, 2^{2101212022201} is an apocalyptic number.

It is an amenable number.

2101212022201 is a deficient number, since it is larger than the sum of its proper divisors (334754091).

2101212022201 is an equidigital number, since it uses as much as digits as its factorization.

2101212022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334754090.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2101212022201 its reverse (1022202121012), we get a palindrome (3123414143213).

It can be divided in two parts, 210121 and 2022201, that added together give a palindrome (2232322).

The spelling of 2101212022201 in words is "two trillion, one hundred one billion, two hundred twelve million, twenty-two thousand, two hundred one".