221212403341 has 4 divisors (see below), whose sum is σ = 221213496672. Its totient is φ = 221211310012.

The previous prime is 221212403333. The next prime is 221212403351. The reversal of 221212403341 is 143304212122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 143304212122 = 2 ⋅71652106061.

It is a cyclic number.

It is not a de Polignac number, because 221212403341 - 2³ = 221212403333 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 (221212403351) 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, 144601 + ... + 680686.

It is an arithmetic number, because the mean of its divisors is an integer number (55303374168).

Almost surely, 2^221212403341 is an apocalyptic number.

It is an amenable number.

221212403341 is a deficient number, since it is larger than the sum of its proper divisors (1093331).

221212403341 is an equidigital number, since it uses as much as digits as its factorization.

221212403341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093330.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221212403341 its reverse (143304212122), we get a palindrome (364516615463).

The spelling of 221212403341 in words is "two hundred twenty-one billion, two hundred twelve million, four hundred three thousand, three hundred forty-one".