2212340421421 has 16 divisors (see below), whose sum is σ = 2421836308528. Its totient is φ = 2008468224000.

The previous prime is 2212340421407. The next prime is 2212340421427. The reversal of 2212340421421 is 1241240432122.

It can be written as a sum of positive squares in 8 ways, for example, as 534564237321 + 1677776184100 = 731139^2 + 1295290^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212340421421 - 2¹³ = 2212340413229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2212340421421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212340421427) 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 15 ways as a sum of consecutive naturals, for example, 7545871 + ... + 7833571.

It is an arithmetic number, because the mean of its divisors is an integer number (151364769283).

Almost surely, 2^{2212340421421} is an apocalyptic number.

It is an amenable number.

2212340421421 is a deficient number, since it is larger than the sum of its proper divisors (209495887107).

2212340421421 is a wasteful number, since it uses less digits than its factorization.

2212340421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297472.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 2212340421421 its reverse (1241240432122), we get a palindrome (3453580853543).

The spelling of 2212340421421 in words is "two trillion, two hundred twelve billion, three hundred forty million, four hundred twenty-one thousand, four hundred twenty-one".