212333202420421 has 4 divisors (see below), whose sum is σ = 212341869460000. Its totient is φ = 212324535380844.

The previous prime is 212333202420371. The next prime is 212333202420487. The reversal of 212333202420421 is 124024202333212.

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.

It is a cyclic number.

It is not a de Polignac number, because 212333202420421 - 2¹⁵ = 212333202387653 is a prime.

It is a super-2 number, since 2×212333202420421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212333202420491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4333483041 + ... + 4333532038.

It is an arithmetic number, because the mean of its divisors is an integer number (53085467365000).

Almost surely, 2^{212333202420421} is an apocalyptic number.

It is an amenable number.

212333202420421 is a deficient number, since it is larger than the sum of its proper divisors (8667039579).

212333202420421 is an equidigital number, since it uses as much as digits as its factorization.

212333202420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8667039578.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 212333202420421 its reverse (124024202333212), we get a palindrome (336357404753633).

The spelling of 212333202420421 in words is "two hundred twelve trillion, three hundred thirty-three billion, two hundred two million, four hundred twenty thousand, four hundred twenty-one".