212224003332421 has 4 divisors (see below), whose sum is σ = 214207405232832. Its totient is φ = 210240601432012.

The previous prime is 212224003332379. The next prime is 212224003332437. The reversal of 212224003332421 is 124233300422212.

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 212224003332421 - 2¹¹ = 212224003330373 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 (212224003332821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991700950045 + ... + 991700950258.

It is an arithmetic number, because the mean of its divisors is an integer number (53551851308208).

Almost surely, 2^{212224003332421} is an apocalyptic number.

It is an amenable number.

212224003332421 is a deficient number, since it is larger than the sum of its proper divisors (1983401900411).

212224003332421 is a wasteful number, since it uses less digits than its factorization.

212224003332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983401900410.

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

Adding to 212224003332421 its reverse (124233300422212), we get a palindrome (336457303754633).

The spelling of 212224003332421 in words is "two hundred twelve trillion, two hundred twenty-four billion, three million, three hundred thirty-two thousand, four hundred twenty-one".