21214035523201 has 4 divisors (see below), whose sum is σ = 21214083040192. Its totient is φ = 21213988006212.

The previous prime is 21214035523199. The next prime is 21214035523217. The reversal of 21214035523201 is 10232553041212.

It is a happy number.

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 21214035523201 - 2¹ = 21214035523199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214035520201) 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, 23082405 + ... + 23983858.

It is an arithmetic number, because the mean of its divisors is an integer number (5303520760048).

Almost surely, 2^{21214035523201} is an apocalyptic number.

It is an amenable number.

21214035523201 is a deficient number, since it is larger than the sum of its proper divisors (47516991).

21214035523201 is an equidigital number, since it uses as much as digits as its factorization.

21214035523201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47516990.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 21214035523201 its reverse (10232553041212), we get a palindrome (31446588564413).

The spelling of 21214035523201 in words is "twenty-one trillion, two hundred fourteen billion, thirty-five million, five hundred twenty-three thousand, two hundred one".