2012212211021 has 4 divisors (see below), whose sum is σ = 2012219038044. Its totient is φ = 2012205384000.

The previous prime is 2012212211003. The next prime is 2012212211027. The reversal of 2012212211021 is 1201122122102.

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 1959468036100 + 52744174921 = 1399810^2 + 229661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012212211021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012212211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950460 + ... + 3567861.

It is an arithmetic number, because the mean of its divisors is an integer number (503054759511).

Almost surely, 2^{2012212211021} is an apocalyptic number.

It is an amenable number.

2012212211021 is a deficient number, since it is larger than the sum of its proper divisors (6827023).

2012212211021 is an equidigital number, since it uses as much as digits as its factorization.

2012212211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827022.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2012212211021 its reverse (1201122122102), we get a palindrome (3213334333123).

The spelling of 2012212211021 in words is "two trillion, twelve billion, two hundred twelve million, two hundred eleven thousand, twenty-one".