2112322212421 has 2 divisors, whose sum is σ = 2112322212422. Its totient is φ = 2112322212420.

The previous prime is 2112322212389. The next prime is 2112322212493. The reversal of 2112322212421 is 1242122232112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1959960800196 + 152361412225 = 1399986^2 + 390335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112322212421 - 2⁵ = 2112322212389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112322212521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056161106210 + 1056161106211.

It is an arithmetic number, because the mean of its divisors is an integer number (1056161106211).

Almost surely, 2^{2112322212421} is an apocalyptic number.

It is an amenable number.

2112322212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112322212421 is an equidigital number, since it uses as much as digits as its factorization.

2112322212421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

Adding to 2112322212421 its reverse (1242122232112), we get a palindrome (3354444444533).

The spelling of 2112322212421 in words is "two trillion, one hundred twelve billion, three hundred twenty-two million, two hundred twelve thousand, four hundred twenty-one".