21214030042221 has 64 divisors (see below), whose sum is σ = 30378426624000. Its totient is φ = 13128608756736.

The previous prime is 21214030042207. The next prime is 21214030042267. The reversal of 21214030042221 is 12224003041212.

It is not a de Polignac number, because 21214030042221 - 2¹⁵ = 21214030009453 is a prime.

It is a super-2 number, since 2×21214030042221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21214030042191 and 21214030042200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214030042321) 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 63 ways as a sum of consecutive naturals, for example, 933417160 + ... + 933439886.

It is an arithmetic number, because the mean of its divisors is an integer number (474662916000).

Almost surely, 2^{21214030042221} is an apocalyptic number.

It is an amenable number.

21214030042221 is a deficient number, since it is larger than the sum of its proper divisors (9164396581779).

21214030042221 is a wasteful number, since it uses less digits than its factorization.

21214030042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24098.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21214030042221 its reverse (12224003041212), we get a palindrome (33438033083433).

The spelling of 21214030042221 in words is "twenty-one trillion, two hundred fourteen billion, thirty million, forty-two thousand, two hundred twenty-one".