2212132312121 has 4 divisors (see below), whose sum is σ = 2217704434212. Its totient is φ = 2206560190032.

The previous prime is 2212132312111. The next prime is 2212132312129. The reversal of 2212132312121 is 1212132312122.

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 1962831822121 + 249300490000 = 1401011^2 + 499300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212132312121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212132312129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2786060450 + ... + 2786061243.

It is an arithmetic number, because the mean of its divisors is an integer number (554426108553).

Almost surely, 2^{2212132312121} is an apocalyptic number.

It is an amenable number.

2212132312121 is a deficient number, since it is larger than the sum of its proper divisors (5572122091).

2212132312121 is an equidigital number, since it uses as much as digits as its factorization.

2212132312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572122090.

The product of its digits is 576, while the sum is 23.

Adding to 2212132312121 its reverse (1212132312122), we get a palindrome (3424264624243).

Subtracting from 2212132312121 its reverse (1212132312122), we obtain a palindrome (999999999999).

The spelling of 2212132312121 in words is "two trillion, two hundred twelve billion, one hundred thirty-two million, three hundred twelve thousand, one hundred twenty-one".