211522445130421 has 8 divisors (see below), whose sum is σ = 211550675849280. Its totient is φ = 211494215678592.

The previous prime is 211522445130383. The next prime is 211522445130433. The reversal of 211522445130421 is 124031544225112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211522445130421 - 2¹⁹ = 211522444606133 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 (211522445430421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360695781 + ... + 361281733.

It is an arithmetic number, because the mean of its divisors is an integer number (26443834481160).

Almost surely, 2^{211522445130421} is an apocalyptic number.

It is an amenable number.

211522445130421 is a deficient number, since it is larger than the sum of its proper divisors (28230718859).

211522445130421 is an equidigital number, since it uses as much as digits as its factorization.

211522445130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633515.

The product of its (nonzero) digits is 76800, while the sum is 37.

Adding to 211522445130421 its reverse (124031544225112), we get a palindrome (335553989355533).

The spelling of 211522445130421 in words is "two hundred eleven trillion, five hundred twenty-two billion, four hundred forty-five million, one hundred thirty thousand, four hundred twenty-one".