2112211021001 has 4 divisors (see below), whose sum is σ = 2113192077972. Its totient is φ = 2111229964032.

The previous prime is 2112211020961. The next prime is 2112211021021. The reversal of 2112211021001 is 1001201122112.

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 205190880400 + 1907020140601 = 452980^2 + 1380949^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112211021001 - 2¹⁸ = 2112210758857 is a prime.

It is a super-2 number, since 2×2112211021001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2112211021021) 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 3 ways as a sum of consecutive naturals, for example, 490525256 + ... + 490529561.

It is an arithmetic number, because the mean of its divisors is an integer number (528298019493).

Almost surely, 2^{2112211021001} is an apocalyptic number.

It is an amenable number.

2112211021001 is a deficient number, since it is larger than the sum of its proper divisors (981056971).

2112211021001 is an equidigital number, since it uses as much as digits as its factorization.

2112211021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981056970.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2112211021001 its reverse (1001201122112), we get a palindrome (3113412143113).

The spelling of 2112211021001 in words is "two trillion, one hundred twelve billion, two hundred eleven million, twenty-one thousand, one".