2101012012221 has 4 divisors (see below), whose sum is σ = 2801349349632. Its totient is φ = 1400674674812.

The previous prime is 2101012012207. The next prime is 2101012012259. The reversal of 2101012012221 is 1222102101012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2101012012221 - 2¹⁴ = 2101011995837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101012012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101012012721) 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, 350168668701 + ... + 350168668706.

It is an arithmetic number, because the mean of its divisors is an integer number (700337337408).

Almost surely, 2^{2101012012221} is an apocalyptic number.

It is an amenable number.

2101012012221 is a deficient number, since it is larger than the sum of its proper divisors (700337337411).

2101012012221 is an equidigital number, since it uses as much as digits as its factorization.

2101012012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700337337410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2101012012221 its reverse (1222102101012), we get a palindrome (3323114113233).

The spelling of 2101012012221 in words is "two trillion, one hundred one billion, twelve million, twelve thousand, two hundred twenty-one".